// script.aculo.us effects.js v1.8.1, Thu Jan 03 22:07:12 -0500 2008

// Copyright (c) 2005-2007 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
// Contributors:
//  Justin Palmer (http://encytemedia.com/)
//  Mark Pilgrim (http://diveintomark.org/)
//  Martin Bialasinki
// 
// script.aculo.us is freely distributable under the terms of an MIT-style license.
// For details, see the script.aculo.us web site: http://script.aculo.us/ 

// converts rgb() and #xxx to #xxxxxx format,  
// returns self (or first argument) if not convertable  
String.prototype.parseColor = function(){
    var color = '#';
    if (this.slice(0, 4) == 'rgb(') {
        var cols = this.slice(4, this.length - 1).split(',');
        var i = 0;
        do {
            color += parseInt(cols[i]).toColorPart()
        }
        while (++i < 3);
    }
    else {
        if (this.slice(0, 1) == '#') {
            if (this.length == 4) 
                for (var i = 1; i < 4; i++) 
                    color += (this.charAt(i) + this.charAt(i)).toLowerCase();
            if (this.length == 7) 
                color = this.toLowerCase();
        }
    }
    return (color.length == 7 ? color : (arguments[0] || this));
};

/*--------------------------------------------------------------------------*/

Element.collectTextNodes = function(element){
    return $A($(element).childNodes).collect(function(node){
        return (node.nodeType == 3 ? node.nodeValue : (node.hasChildNodes() ? Element.collectTextNodes(node) : ''));
    }).flatten().join('');
};

Element.collectTextNodesIgnoreClass = function(element, className){
    return $A($(element).childNodes).collect(function(node){
        return (node.nodeType == 3 ? node.nodeValue : ((node.hasChildNodes() && !Element.hasClassName(node, className)) ? Element.collectTextNodesIgnoreClass(node, className) : ''));
    }).flatten().join('');
};

Element.setContentZoom = function(element, percent){
    element = $(element);
    element.setStyle({
        fontSize: (percent / 100) + 'em'
    });
    if (Prototype.Browser.WebKit) 
        window.scrollBy(0, 0);
    return element;
};

Element.getInlineOpacity = function(element){
    return $(element).style.opacity || '';
};

Element.forceRerendering = function(element){
    try {
        element = $(element);
        var n = document.createTextNode(' ');
        element.appendChild(n);
        element.removeChild(n);
    } 
    catch (e) {
    }
};

/*--------------------------------------------------------------------------*/

var Effect = {
    _elementDoesNotExistError: {
        name: 'ElementDoesNotExistError',
        message: 'The specified DOM element does not exist, but is required for this effect to operate'
    },
    Transitions: {
        linear: Prototype.K,
        sinoidal: function(pos){
            return (-Math.cos(pos * Math.PI) / 2) + 0.5;
        },
        reverse: function(pos){
            return 1 - pos;
        },
        flicker: function(pos){
            var pos = ((-Math.cos(pos * Math.PI) / 4) + 0.75) + Math.random() / 4;
            return pos > 1 ? 1 : pos;
        },
        wobble: function(pos){
            return (-Math.cos(pos * Math.PI * (9 * pos)) / 2) + 0.5;
        },
        pulse: function(pos, pulses){
            pulses = pulses || 5;
            return (((pos % (1 / pulses)) * pulses).round() == 0 ? ((pos * pulses * 2) - (pos * pulses * 2).floor()) : 1 - ((pos * pulses * 2) - (pos * pulses * 2).floor()));
        },
        spring: function(pos){
            return 1 - (Math.cos(pos * 4.5 * Math.PI) * Math.exp(-pos * 6));
        },
        sebispring: function(pos){
            return 1 - (Math.cos(pos * 0.5 * Math.PI) * Math.exp(-pos * 2));
        },
        none: function(pos){
            return 0;
        },
        full: function(pos){
            return 1;
        }
    },
    DefaultOptions: {
        duration: 1.0, // seconds
        fps: 100, // 100= assume 66fps max.
        sync: false, // true for combining
        from: 0.0,
        to: 1.0,
        delay: 0.0,
        queue: 'parallel'
    },
    tagifyText: function(element){
        var tagifyStyle = 'position:relative';
        if (Prototype.Browser.IE) 
            tagifyStyle += ';zoom:1';
        
        element = $(element);
        $A(element.childNodes).each(function(child){
            if (child.nodeType == 3) {
                child.nodeValue.toArray().each(function(character){
                    element.insertBefore(new Element('span', {
                        style: tagifyStyle
                    }).update(character == ' ' ? String.fromCharCode(160) : character), child);
                });
                Element.remove(child);
            }
        });
    },
    multiple: function(element, effect){
        var elements;
        if (((typeof element == 'object') ||
        Object.isFunction(element)) &&
        (element.length)) 
            elements = element;
        else 
            elements = $(element).childNodes;
        
        var options = Object.extend({
            speed: 0.1,
            delay: 0.0
        }, arguments[2] ||
        {});
        var masterDelay = options.delay;
        
        $A(elements).each(function(element, index){
            new effect(element, Object.extend(options, {
                delay: index * options.speed + masterDelay
            }));
        });
    },
    PAIRS: {
        'slide': ['SlideDown', 'SlideUp'],
        'blind': ['BlindDown', 'BlindUp'],
        'appear': ['Appear', 'Fade']
    },
    toggle: function(element, effect){
        element = $(element);
        effect = (effect || 'appear').toLowerCase();
        var options = Object.extend({
            queue: {
                position: 'end',
                scope: (element.id || 'global'),
                limit: 1
            }
        }, arguments[2] ||
        {});
        Effect[element.visible() ? Effect.PAIRS[effect][1] : Effect.PAIRS[effect][0]](element, options);
    }
};

Effect.DefaultOptions.transition = Effect.Transitions.sinoidal;

/* ------------- core effects ------------- */

Effect.ScopedQueue = Class.create(Enumerable, {
    initialize: function(){
        this.effects = [];
        this.interval = null;
    },
    _each: function(iterator){
        this.effects._each(iterator);
    },
    add: function(effect){
        var timestamp = new Date().getTime();
        
        var position = Object.isString(effect.options.queue) ? effect.options.queue : effect.options.queue.position;
        
        switch (position) {
            case 'front':
                // move unstarted effects after this effect  
                this.effects.findAll(function(e){
                    return e.state == 'idle'
                }).each(function(e){
                    e.startOn += effect.finishOn;
                    e.finishOn += effect.finishOn;
                });
                break;
            case 'with-last':
                timestamp = this.effects.pluck('startOn').max() || timestamp;
                break;
            case 'end':
                // start effect after last queued effect has finished
                timestamp = this.effects.pluck('finishOn').max() || timestamp;
                break;
        }
        
        effect.startOn += timestamp;
        effect.finishOn += timestamp;
        
        if (!effect.options.queue.limit || (this.effects.length < effect.options.queue.limit)) 
            this.effects.push(effect);
        
        if (!this.interval) 
            this.interval = setInterval(this.loop.bind(this), 15);
    },
    remove: function(effect){
        this.effects = this.effects.reject(function(e){
            return e == effect
        });
        if (this.effects.length == 0) {
            clearInterval(this.interval);
            this.interval = null;
        }
    },
    loop: function(){
        var timePos = new Date().getTime();
        for (var i = 0, len = this.effects.length; i < len; i++) 
            this.effects[i] && this.effects[i].loop(timePos);
    }
});

Effect.Queues = {
    instances: $H(),
    get: function(queueName){
        if (!Object.isString(queueName)) 
            return queueName;
        
        return this.instances.get(queueName) ||
        this.instances.set(queueName, new Effect.ScopedQueue());
    }
};
Effect.Queue = Effect.Queues.get('global');

Effect.Base = Class.create({
    position: null,
    start: function(options){
        function codeForEvent(options, eventName){
            return ((options[eventName + 'Internal'] ? 'this.options.' + eventName + 'Internal(this);' : '') +
            (options[eventName] ? 'this.options.' + eventName + '(this);' : ''));
        }
        if (options && options.transition === false) 
            options.transition = Effect.Transitions.linear;
        this.options = Object.extend(Object.extend({}, Effect.DefaultOptions), options ||
        {});
        this.currentFrame = 0;
        this.state = 'idle';
        this.startOn = this.options.delay * 1000;
        this.finishOn = this.startOn + (this.options.duration * 1000);
        this.fromToDelta = this.options.to - this.options.from;
        this.totalTime = this.finishOn - this.startOn;
        this.totalFrames = this.options.fps * this.options.duration;
        
        eval('this.render = function(pos){ ' +
        'if (this.state=="idle"){this.state="running";' +
        codeForEvent(this.options, 'beforeSetup') +
        (this.setup ? 'this.setup();' : '') +
        codeForEvent(this.options, 'afterSetup') +
        '};if (this.state=="running"){' +
        'pos=this.options.transition(pos)*' +
        this.fromToDelta +
        '+' +
        this.options.from +
        ';' +
        'this.position=pos;' +
        codeForEvent(this.options, 'beforeUpdate') +
        (this.update ? 'this.update(pos);' : '') +
        codeForEvent(this.options, 'afterUpdate') +
        '}}');
        
        this.event('beforeStart');
        if (!this.options.sync) 
            Effect.Queues.get(Object.isString(this.options.queue) ? 'global' : this.options.queue.scope).add(this);
    },
    loop: function(timePos){
        if (timePos >= this.startOn) {
            if (timePos >= this.finishOn) {
                this.render(1.0);
                this.cancel();
                this.event('beforeFinish');
                if (this.finish) 
                    this.finish();
                this.event('afterFinish');
                return;
            }
            var pos = (timePos - this.startOn) / this.totalTime, frame = (pos * this.totalFrames).round();
            if (frame > this.currentFrame) {
                this.render(pos);
                this.currentFrame = frame;
            }
        }
    },
    cancel: function(){
        if (!this.options.sync) 
            Effect.Queues.get(Object.isString(this.options.queue) ? 'global' : this.options.queue.scope).remove(this);
        this.state = 'finished';
    },
    event: function(eventName){
        if (this.options[eventName + 'Internal']) 
            this.options[eventName + 'Internal'](this);
        if (this.options[eventName]) 
            this.options[eventName](this);
    },
    inspect: function(){
        var data = $H();
        for (property in this) 
            if (!Object.isFunction(this[property])) 
                data.set(property, this[property]);
        return '#<Effect:' + data.inspect() + ',options:' + $H(this.options).inspect() + '>';
    }
});

Effect.Parallel = Class.create(Effect.Base, {
    initialize: function(effects){
        this.effects = effects || [];
        this.start(arguments[1]);
    },
    update: function(position){
        this.effects.invoke('render', position);
    },
    finish: function(position){
        this.effects.each(function(effect){
            effect.render(1.0);
            effect.cancel();
            effect.event('beforeFinish');
            if (effect.finish) 
                effect.finish(position);
            effect.event('afterFinish');
        });
    }
});

Effect.Tween = Class.create(Effect.Base, {
    initialize: function(object, from, to){
        object = Object.isString(object) ? $(object) : object;
        var args = $A(arguments), method = args.last(), options = args.length == 5 ? args[3] : null;
        this.method = Object.isFunction(method) ? method.bind(object) : Object.isFunction(object[method]) ? object[method].bind(object) : function(value){
            object[method] = value
        };
        this.start(Object.extend({
            from: from,
            to: to
        }, options ||
        {}));
    },
    update: function(position){
        this.method(position);
    }
});

Effect.Event = Class.create(Effect.Base, {
    initialize: function(){
        this.start(Object.extend({
            duration: 0
        }, arguments[0] ||
        {}));
    },
    update: Prototype.emptyFunction
});

Effect.Opacity = Class.create(Effect.Base, {
    initialize: function(element){
        this.element = $(element);
        if (!this.element) 
            throw (Effect._elementDoesNotExistError);
        // make this work on IE on elements without 'layout'
        if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout)) 
            this.element.setStyle({
                zoom: 1
            });
        var options = Object.extend({
            from: this.element.getOpacity() || 0.0,
            to: 1.0
        }, arguments[1] ||
        {});
        this.start(options);
    },
    update: function(position){
        this.element.setOpacity(position);
    }
});

Effect.Move = Class.create(Effect.Base, {
    initialize: function(element){
        this.element = $(element);
        if (!this.element) 
            throw (Effect._elementDoesNotExistError);
        var options = Object.extend({
            x: parseInt(this.element.getStyle('left')),
            y: 0,
            mode: 'relative'
        }, arguments[1] ||
        {});
        this.start(options);
    },
    setup: function(){
        this.element.makePositioned();
        this.originalLeft = parseFloat(this.element.getStyle('left') || '0');
        this.originalTop = parseFloat(this.element.getStyle('top') || '0');
        if (this.options.mode == 'absolute') {
            this.options.x = this.options.x - this.originalLeft;
            this.options.y = this.options.y - this.originalTop;
        }
    },
    update: function(position){
        this.element.setStyle({
            left: (this.options.x * position + this.originalLeft).round() + 'px',
            top: (this.options.y * position + this.originalTop).round() + 'px'
        });
    }
});

// for backwards compatibility
Effect.MoveBy = function(element, toTop, toLeft){
    return new Effect.Move(element, Object.extend({
        x: toLeft,
        y: toTop
    }, arguments[3] ||
    {}));
};

Effect.Scale = Class.create(Effect.Base, {
    initialize: function(element, percent){
        this.element = $(element);
        if (!this.element) 
            throw (Effect._elementDoesNotExistError);
        var options = Object.extend({
            scaleX: true,
            scaleY: true,
            scaleContent: true,
            scaleFromCenter: false,
            scaleMode: 'box', // 'box' or 'contents' or { } with provided values
            scaleFrom: 100.0,
            scaleTo: percent
        }, arguments[2] ||
        {});
        this.start(options);
    },
    setup: function(){
        this.restoreAfterFinish = this.options.restoreAfterFinish || false;
        this.elementPositioning = this.element.getStyle('position');
        
        this.originalStyle = {};
        ['top', 'left', 'width', 'height', 'fontSize'].each(function(k){
            this.originalStyle[k] = this.element.style[k];
        }
.bind(this));
        
        this.originalTop = this.element.offsetTop;
        this.originalLeft = this.element.offsetLeft;
        
        var fontSize = this.element.getStyle('font-size') || '100%';
        ['em', 'px', '%', 'pt'].each(function(fontSizeType){
            if (fontSize.indexOf(fontSizeType) > 0) {
                this.fontSize = parseFloat(fontSize);
                this.fontSizeType = fontSizeType;
            }
        }
.bind(this));
        
        this.factor = (this.options.scaleTo - this.options.scaleFrom) / 100;
        
        this.dims = null;
        if (this.options.scaleMode == 'box') 
            this.dims = [this.element.offsetHeight, this.element.offsetWidth];
        if (/^content/.test(this.options.scaleMode)) 
            this.dims = [this.element.scrollHeight, this.element.scrollWidth];
        if (!this.dims) 
            this.dims = [this.options.scaleMode.originalHeight, this.options.scaleMode.originalWidth];
    },
    update: function(position){
        var currentScale = (this.options.scaleFrom / 100.0) + (this.factor * position);
        if (this.options.scaleContent && this.fontSize) 
            this.element.setStyle({
                fontSize: this.fontSize * currentScale + this.fontSizeType
            });
        this.setDimensions(this.dims[0] * currentScale, this.dims[1] * currentScale);
    },
    finish: function(position){
        if (this.restoreAfterFinish) 
            this.element.setStyle(this.originalStyle);
    },
    setDimensions: function(height, width){
        var d = {};
        if (this.options.scaleX) 
            d.width = width.round() + 'px';
        if (this.options.scaleY) 
            d.height = height.round() + 'px';
        if (this.options.scaleFromCenter) {
            var topd = (height - this.dims[0]) / 2;
            var leftd = (width - this.dims[1]) / 2;
            if (this.elementPositioning == 'absolute') {
                if (this.options.scaleY) 
                    d.top = this.originalTop - topd + 'px';
                if (this.options.scaleX) 
                    d.left = this.originalLeft - leftd + 'px';
            }
            else {
                if (this.options.scaleY) 
                    d.top = -topd + 'px';
                if (this.options.scaleX) 
                    d.left = -leftd + 'px';
            }
        }
        this.element.setStyle(d);
    }
});

Effect.Highlight = Class.create(Effect.Base, {
    initialize: function(element){
        this.element = $(element);
        if (!this.element) 
            throw (Effect._elementDoesNotExistError);
        var options = Object.extend({
            startcolor: '#ffff99'
        }, arguments[1] ||
        {});
        this.start(options);
    },
    setup: function(){
        // Prevent executing on elements not in the layout flow
        if (this.element.getStyle('display') == 'none') {
            this.cancel();
            return;
        }
        // Disable background image during the effect
        this.oldStyle = {};
        if (!this.options.keepBackgroundImage) {
            this.oldStyle.backgroundImage = this.element.getStyle('background-image');
            this.element.setStyle({
                backgroundImage: 'none'
            });
        }
        if (!this.options.endcolor) 
            this.options.endcolor = this.element.getStyle('background-color').parseColor('#ffffff');
        if (!this.options.restorecolor) 
            this.options.restorecolor = this.element.getStyle('background-color');
        // init color calculations
        this._base = $R(0, 2).map(function(i){
            return parseInt(this.options.startcolor.slice(i * 2 + 1, i * 2 + 3), 16)
        }
.bind(this));
        this._delta = $R(0, 2).map(function(i){
            return parseInt(this.options.endcolor.slice(i * 2 + 1, i * 2 + 3), 16) - this._base[i]
        }
.bind(this));
    },
    update: function(position){
        this.element.setStyle({
            backgroundColor: $R(0, 2).inject('#', function(m, v, i){
                return m + ((this._base[i] + (this._delta[i] * position)).round().toColorPart());
            }
.bind(this))
        });
    },
    finish: function(){
        this.element.setStyle(Object.extend(this.oldStyle, {
            backgroundColor: this.options.restorecolor
        }));
    }
});

Effect.ScrollTo = function(element){
    var options = arguments[1] ||
    {}, scrollOffsets = document.viewport.getScrollOffsets(), elementOffsets = $(element).cumulativeOffset(), max = (window.height || document.body.scrollHeight) - document.viewport.getHeight();
    
    if (options.offset) 
        elementOffsets[1] += options.offset;
    
    return new Effect.Tween(null, scrollOffsets.top, elementOffsets[1] > max ? max : elementOffsets[1], options, function(p){
        scrollTo(scrollOffsets.left, p.round())
    });
};

/* ------------- combination effects ------------- */

Effect.Fade = function(element){
    element = $(element);
    var oldOpacity = element.getInlineOpacity();
    var options = Object.extend({
        from: element.getOpacity() || 1.0,
        to: 0.0,
        afterFinishInternal: function(effect){
            if (effect.options.to != 0) 
                return;
            effect.element.hide().setStyle({
                opacity: oldOpacity
            });
        }
    }, arguments[1] ||
    {});
    return new Effect.Opacity(element, options);
};

Effect.Appear = function(element){
    element = $(element);
    var options = Object.extend({
        from: (element.getStyle('display') == 'none' ? 0.0 : element.getOpacity() || 0.0),
        to: 1.0,
        // force Safari to render floated elements properly
        afterFinishInternal: function(effect){
            effect.element.forceRerendering();
        },
        beforeSetup: function(effect){
            effect.element.setOpacity(effect.options.from).show();
        }
    }, arguments[1] ||
    {});
    return new Effect.Opacity(element, options);
};

Effect.Puff = function(element){
    element = $(element);
    var oldStyle = {
        opacity: element.getInlineOpacity(),
        position: element.getStyle('position'),
        top: element.style.top,
        left: element.style.left,
        width: element.style.width,
        height: element.style.height
    };
    return new Effect.Parallel([new Effect.Scale(element, 200, {
        sync: true,
        scaleFromCenter: true,
        scaleContent: true,
        restoreAfterFinish: true
    }), new Effect.Opacity(element, {
        sync: true,
        to: 0.0
    })], Object.extend({
        duration: 1.0,
        beforeSetupInternal: function(effect){
            Position.absolutize(effect.effects[0].element)
        },
        afterFinishInternal: function(effect){
            effect.effects[0].element.hide().setStyle(oldStyle);
        }
    }, arguments[1] ||
    {}));
};

Effect.BlindUp = function(element){
    element = $(element);
    element.makeClipping();
    return new Effect.Scale(element, 0, Object.extend({
        scaleContent: false,
        scaleX: false,
        restoreAfterFinish: true,
        afterFinishInternal: function(effect){
            effect.element.hide().undoClipping();
        }
    }, arguments[1] ||
    {}));
};

Effect.BlindDown = function(element){
    element = $(element);
    var elementDimensions = element.getDimensions();
    return new Effect.Scale(element, 100, Object.extend({
        scaleContent: false,
        scaleX: false,
        scaleFrom: 0,
        scaleMode: {
            originalHeight: elementDimensions.height,
            originalWidth: elementDimensions.width
        },
        restoreAfterFinish: true,
        afterSetup: function(effect){
            effect.element.makeClipping().setStyle({
                height: '0px'
            }).show();
        },
        afterFinishInternal: function(effect){
            effect.element.undoClipping();
        }
    }, arguments[1] ||
    {}));
};

Effect.SwitchOff = function(element){
    element = $(element);
    var oldOpacity = element.getInlineOpacity();
    return new Effect.Appear(element, Object.extend({
        duration: 0.4,
        from: 0,
        transition: Effect.Transitions.flicker,
        afterFinishInternal: function(effect){
            new Effect.Scale(effect.element, 1, {
                duration: 0.3,
                scaleFromCenter: true,
                scaleX: false,
                scaleContent: false,
                restoreAfterFinish: true,
                beforeSetup: function(effect){
                    effect.element.makePositioned().makeClipping();
                },
                afterFinishInternal: function(effect){
                    effect.element.hide().undoClipping().undoPositioned().setStyle({
                        opacity: oldOpacity
                    });
                }
            })
        }
    }, arguments[1] ||
    {}));
};

Effect.DropOut = function(element){
    element = $(element);
    var oldStyle = {
        top: element.getStyle('top'),
        left: element.getStyle('left'),
        opacity: element.getInlineOpacity()
    };
    return new Effect.Parallel([new Effect.Move(element, {
        x: 0,
        y: 100,
        sync: true
    }), new Effect.Opacity(element, {
        sync: true,
        to: 0.0
    })], Object.extend({
        duration: 0.5,
        beforeSetup: function(effect){
            effect.effects[0].element.makePositioned();
        },
        afterFinishInternal: function(effect){
            effect.effects[0].element.hide().undoPositioned().setStyle(oldStyle);
        }
    }, arguments[1] ||
    {}));
};

Effect.Shake = function(element){
    element = $(element);
    var options = Object.extend({
        distance: 20,
        duration: 0.5
    }, arguments[1] ||
    {});
    var distance = parseFloat(options.distance);
    var split = parseFloat(options.duration) / 10.0;
    var oldStyle = {
        top: element.getStyle('top'),
        left: element.getStyle('left')
    };
    return new Effect.Move(element, {
        x: distance,
        y: 0,
        duration: split,
        afterFinishInternal: function(effect){
            new Effect.Move(effect.element, {
                x: -distance * 2,
                y: 0,
                duration: split * 2,
                afterFinishInternal: function(effect){
                    new Effect.Move(effect.element, {
                        x: distance * 2,
                        y: 0,
                        duration: split * 2,
                        afterFinishInternal: function(effect){
                            new Effect.Move(effect.element, {
                                x: -distance * 2,
                                y: 0,
                                duration: split * 2,
                                afterFinishInternal: function(effect){
                                    new Effect.Move(effect.element, {
                                        x: distance * 2,
                                        y: 0,
                                        duration: split * 2,
                                        afterFinishInternal: function(effect){
                                            new Effect.Move(effect.element, {
                                                x: -distance,
                                                y: 0,
                                                duration: split,
                                                afterFinishInternal: function(effect){
                                                    effect.element.undoPositioned().setStyle(oldStyle);
                                                }
                                            })
                                        }
                                    })
                                }
                            })
                        }
                    })
                }
            })
        }
    });
};

Effect.SlideDown = function(element){
    element = $(element).cleanWhitespace();
    // SlideDown need to have the content of the element wrapped in a container element with fixed height!
    var oldInnerBottom = element.down().getStyle('bottom');
    var elementDimensions = element.getDimensions();
    return new Effect.Scale(element, 100, Object.extend({
        scaleContent: false,
        scaleX: false,
        scaleFrom: window.opera ? 0 : 1,
        scaleMode: {
            originalHeight: elementDimensions.height,
            originalWidth: elementDimensions.width
        },
        restoreAfterFinish: true,
        afterSetup: function(effect){
            effect.element.makePositioned();
            effect.element.down().makePositioned();
            if (window.opera) 
                effect.element.setStyle({
                    top: ''
                });
            effect.element.makeClipping().setStyle({
                height: '0px'
            }).show();
        },
        afterUpdateInternal: function(effect){
            effect.element.down().setStyle({
                bottom: (effect.dims[0] - effect.element.clientHeight) + 'px'
            });
        },
        afterFinishInternal: function(effect){
            effect.element.undoClipping().undoPositioned();
            effect.element.down().undoPositioned().setStyle({
                bottom: oldInnerBottom
            });
        }
    }, arguments[1] ||
    {}));
};

Effect.SlideUp = function(element){
    element = $(element).cleanWhitespace();
    var oldInnerBottom = element.down().getStyle('bottom');
    var elementDimensions = element.getDimensions();
    return new Effect.Scale(element, window.opera ? 0 : 1, Object.extend({
        scaleContent: false,
        scaleX: false,
        scaleMode: 'box',
        scaleFrom: 100,
        scaleMode: {
            originalHeight: elementDimensions.height,
            originalWidth: elementDimensions.width
        },
        restoreAfterFinish: true,
        afterSetup: function(effect){
            effect.element.makePositioned();
            effect.element.down().makePositioned();
            if (window.opera) 
                effect.element.setStyle({
                    top: ''
                });
            effect.element.makeClipping().show();
        },
        afterUpdateInternal: function(effect){
            effect.element.down().setStyle({
                bottom: (effect.dims[0] - effect.element.clientHeight) + 'px'
            });
        },
        afterFinishInternal: function(effect){
            effect.element.hide().undoClipping().undoPositioned();
            effect.element.down().undoPositioned().setStyle({
                bottom: oldInnerBottom
            });
        }
    }, arguments[1] ||
    {}));
};

// Bug in opera makes the TD containing this element expand for a instance after finish 
Effect.Squish = function(element){
    return new Effect.Scale(element, window.opera ? 1 : 0, {
        restoreAfterFinish: true,
        beforeSetup: function(effect){
            effect.element.makeClipping();
        },
        afterFinishInternal: function(effect){
            effect.element.hide().undoClipping();
        }
    });
};

Effect.Grow = function(element){
    element = $(element);
    var options = Object.extend({
        direction: 'center',
        moveTransition: Effect.Transitions.sinoidal,
        scaleTransition: Effect.Transitions.sinoidal,
        opacityTransition: Effect.Transitions.full
    }, arguments[1] ||
    {});
    var oldStyle = {
        top: element.style.top,
        left: element.style.left,
        height: element.style.height,
        width: element.style.width,
        opacity: element.getInlineOpacity()
    };
    
    var dims = element.getDimensions();
    var initialMoveX, initialMoveY;
    var moveX, moveY;
    
    switch (options.direction) {
        case 'top-left':
            initialMoveX = initialMoveY = moveX = moveY = 0;
            break;
        case 'top-right':
            initialMoveX = dims.width;
            initialMoveY = moveY = 0;
            moveX = -dims.width;
            break;
        case 'bottom-left':
            initialMoveX = moveX = 0;
            initialMoveY = dims.height;
            moveY = -dims.height;
            break;
        case 'bottom-right':
            initialMoveX = dims.width;
            initialMoveY = dims.height;
            moveX = -dims.width;
            moveY = -dims.height;
            break;
        case 'center':
            initialMoveX = dims.width / 2;
            initialMoveY = dims.height / 2;
            moveX = -dims.width / 2;
            moveY = -dims.height / 2;
            break;
    }
    
    return new Effect.Move(element, {
        x: initialMoveX,
        y: initialMoveY,
        duration: 0.01,
        beforeSetup: function(effect){
            effect.element.hide().makeClipping().makePositioned();
        },
        afterFinishInternal: function(effect){
            new Effect.Parallel([new Effect.Opacity(effect.element, {
                sync: true,
                to: 1.0,
                from: 0.0,
                transition: options.opacityTransition
            }), new Effect.Move(effect.element, {
                x: moveX,
                y: moveY,
                sync: true,
                transition: options.moveTransition
            }), new Effect.Scale(effect.element, 100, {
                scaleMode: {
                    originalHeight: dims.height,
                    originalWidth: dims.width
                },
                sync: true,
                scaleFrom: window.opera ? 1 : 0,
                transition: options.scaleTransition,
                restoreAfterFinish: true
            })], Object.extend({
                beforeSetup: function(effect){
                    effect.effects[0].element.setStyle({
                        height: '0px'
                    }).show();
                },
                afterFinishInternal: function(effect){
                    effect.effects[0].element.undoClipping().undoPositioned().setStyle(oldStyle);
                }
            }, options))
        }
    });
};

Effect.Shrink = function(element){
    element = $(element);
    var options = Object.extend({
        direction: 'center',
        moveTransition: Effect.Transitions.sinoidal,
        scaleTransition: Effect.Transitions.sinoidal,
        opacityTransition: Effect.Transitions.none
    }, arguments[1] ||
    {});
    var oldStyle = {
        top: element.style.top,
        left: element.style.left,
        height: element.style.height,
        width: element.style.width,
        opacity: element.getInlineOpacity()
    };
    
    var dims = element.getDimensions();
    var moveX, moveY;
    
    switch (options.direction) {
        case 'top-left':
            moveX = moveY = 0;
            break;
        case 'top-right':
            moveX = dims.width;
            moveY = 0;
            break;
        case 'bottom-left':
            moveX = 0;
            moveY = dims.height;
            break;
        case 'bottom-right':
            moveX = dims.width;
            moveY = dims.height;
            break;
        case 'center':
            moveX = dims.width / 2;
            moveY = dims.height / 2;
            break;
    }
    
    return new Effect.Parallel([new Effect.Opacity(element, {
        sync: true,
        to: 0.0,
        from: 1.0,
        transition: options.opacityTransition
    }), new Effect.Scale(element, window.opera ? 1 : 0, {
        sync: true,
        transition: options.scaleTransition,
        restoreAfterFinish: true
    }), new Effect.Move(element, {
        x: moveX,
        y: moveY,
        sync: true,
        transition: options.moveTransition
    })], Object.extend({
        beforeStartInternal: function(effect){
            effect.effects[0].element.makePositioned().makeClipping();
        },
        afterFinishInternal: function(effect){
            effect.effects[0].element.hide().undoClipping().undoPositioned().setStyle(oldStyle);
        }
    }, options));
};

Effect.Pulsate = function(element){
    element = $(element);
    var options = arguments[1] ||
    {};
    var oldOpacity = element.getInlineOpacity();
    var transition = options.transition || Effect.Transitions.sinoidal;
    var reverser = function(pos){
        return transition(1 - Effect.Transitions.pulse(pos, options.pulses))
    };
    reverser.bind(transition);
    return new Effect.Opacity(element, Object.extend(Object.extend({
        duration: 2.0,
        from: 0,
        afterFinishInternal: function(effect){
            effect.element.setStyle({
                opacity: oldOpacity
            });
        }
    }, options), {
        transition: reverser
    }));
};

Effect.Fold = function(element){
    element = $(element);
    var oldStyle = {
        top: element.style.top,
        left: element.style.left,
        width: element.style.width,
        height: element.style.height
    };
    element.makeClipping();
    return new Effect.Scale(element, 5, Object.extend({
        scaleContent: false,
        scaleX: false,
        afterFinishInternal: function(effect){
            new Effect.Scale(element, 1, {
                scaleContent: false,
                scaleY: false,
                afterFinishInternal: function(effect){
                    effect.element.hide().undoClipping().setStyle(oldStyle);
                }
            });
        }
    }, arguments[1] ||
    {}));
};

Effect.Morph = Class.create(Effect.Base, {
    initialize: function(element){
        this.element = $(element);
        if (!this.element) 
            throw (Effect._elementDoesNotExistError);
        var options = Object.extend({
            style: {}
        }, arguments[1] ||
        {});
        
        if (!Object.isString(options.style)) 
            this.style = $H(options.style);
        else {
            if (options.style.include(':')) 
                this.style = options.style.parseStyle();
            else {
                this.element.addClassName(options.style);
                this.style = $H(this.element.getStyles());
                this.element.removeClassName(options.style);
                var css = this.element.getStyles();
                this.style = this.style.reject(function(style){
                    return style.value == css[style.key];
                });
                options.afterFinishInternal = function(effect){
                    effect.element.addClassName(effect.options.style);
                    effect.transforms.each(function(transform){
                        effect.element.style[transform.style] = '';
                    });
                }
            }
        }
        this.start(options);
    },
    
    setup: function(){
        function parseColor(color){
            if (!color || ['rgba(0, 0, 0, 0)', 'transparent'].include(color)) 
                color = '#ffffff';
            color = color.parseColor();
            return $R(0, 2).map(function(i){
                return parseInt(color.slice(i * 2 + 1, i * 2 + 3), 16)
            });
        }
        this.transforms = this.style.map(function(pair){
            var property = pair[0], value = pair[1], unit = null;
            
            if (value.parseColor('#zzzzzz') != '#zzzzzz') {
                value = value.parseColor();
                unit = 'color';
            }
            else 
                if (property == 'opacity') {
                    value = parseFloat(value);
                    if (Prototype.Browser.IE && (!this.element.currentStyle.hasLayout)) 
                        this.element.setStyle({
                            zoom: 1
                        });
                }
                else 
                    if (Element.CSS_LENGTH.test(value)) {
                        var components = value.match(/^([\+\-]?[0-9\.]+)(.*)$/);
                        value = parseFloat(components[1]);
                        unit = (components.length == 3) ? components[2] : null;
                    }
            
            var originalValue = this.element.getStyle(property);
            return {
                style: property.camelize(),
                originalValue: unit == 'color' ? parseColor(originalValue) : parseFloat(originalValue || 0),
                targetValue: unit == 'color' ? parseColor(value) : value,
                unit: unit
            };
        }
.bind(this)).reject(function(transform){
            return ((transform.originalValue == transform.targetValue) ||
            (transform.unit != 'color' &&
            (isNaN(transform.originalValue) || isNaN(transform.targetValue))))
        });
    },
    update: function(position){
        var style = {}, transform, i = this.transforms.length;
        while (i--) 
            style[(transform = this.transforms[i]).style] = transform.unit == 'color' ? '#' +
            (Math.round(transform.originalValue[0] +
            (transform.targetValue[0] - transform.originalValue[0]) * position)).toColorPart() +
            (Math.round(transform.originalValue[1] +
            (transform.targetValue[1] - transform.originalValue[1]) * position)).toColorPart() +
            (Math.round(transform.originalValue[2] +
            (transform.targetValue[2] - transform.originalValue[2]) * position)).toColorPart() : (transform.originalValue +
            (transform.targetValue - transform.originalValue) * position).toFixed(3) +
            (transform.unit === null ? '' : transform.unit);
        this.element.setStyle(style, true);
    }
});

Effect.Transform = Class.create({
    initialize: function(tracks){
        this.tracks = [];
        this.options = arguments[1] ||
        {};
        this.addTracks(tracks);
    },
    addTracks: function(tracks){
        tracks.each(function(track){
            track = $H(track);
            var data = track.values().first();
            this.tracks.push($H({
                ids: track.keys().first(),
                effect: Effect.Morph,
                options: {
                    style: data
                }
            }));
        }
.bind(this));
        return this;
    },
    play: function(){
        return new Effect.Parallel(this.tracks.map(function(track){
            var ids = track.get('ids'), effect = track.get('effect'), options = track.get('options');
            var elements = [$(ids) || $$(ids)].flatten();
            return elements.map(function(e){
                return new effect(e, Object.extend({
                    sync: true
                }, options))
            });
        }).flatten(), this.options);
    }
});

Element.CSS_PROPERTIES = $w('backgroundColor backgroundPosition borderBottomColor borderBottomStyle ' +
'borderBottomWidth borderLeftColor borderLeftStyle borderLeftWidth ' +
'borderRightColor borderRightStyle borderRightWidth borderSpacing ' +
'borderTopColor borderTopStyle borderTopWidth bottom clip color ' +
'fontSize fontWeight height left letterSpacing lineHeight ' +
'marginBottom marginLeft marginRight marginTop markerOffset maxHeight ' +
'maxWidth minHeight minWidth opacity outlineColor outlineOffset ' +
'outlineWidth paddingBottom paddingLeft paddingRight paddingTop ' +
'right textIndent top width wordSpacing zIndex');

Element.CSS_LENGTH = /^(([\+\-]?[0-9\.]+)(em|ex|px|in|cm|mm|pt|pc|\%))|0$/;

String.__parseStyleElement = document.createElement('div');
String.prototype.parseStyle = function(){
    var style, styleRules = $H();
    if (Prototype.Browser.WebKit) 
        style = new Element('div', {
            style: this
        }).style;
    else {
        String.__parseStyleElement.innerHTML = '<div style="' + this + '"></div>';
        style = String.__parseStyleElement.childNodes[0].style;
    }
    
    Element.CSS_PROPERTIES.each(function(property){
        if (style[property]) 
            styleRules.set(property, style[property]);
    });
    
    if (Prototype.Browser.IE && this.include('opacity')) 
        styleRules.set('opacity', this.match(/opacity:\s*((?:0|1)?(?:\.\d*)?)/)[1]);
    
    return styleRules;
};

if (document.defaultView && document.defaultView.getComputedStyle) {
    Element.getStyles = function(element){
        var css = document.defaultView.getComputedStyle($(element), null);
        return Element.CSS_PROPERTIES.inject({}, function(styles, property){
            styles[property] = css[property];
            return styles;
        });
    };
}
else {
    Element.getStyles = function(element){
        element = $(element);
        var css = element.currentStyle, styles;
        styles = Element.CSS_PROPERTIES.inject({}, function(results, property){
            results[property] = css[property];
            return results;
        });
        if (!styles.opacity) 
            styles.opacity = element.getOpacity();
        return styles;
    };
};

Effect.Methods = {
    morph: function(element, style){
        element = $(element);
        new Effect.Morph(element, Object.extend({
            style: style
        }, arguments[2] ||
        {}));
        return element;
    },
    visualEffect: function(element, effect, options){
        element = $(element)
        var s = effect.dasherize().camelize(), klass = s.charAt(0).toUpperCase() + s.substring(1);
        new Effect[klass](element, options);
        return element;
    },
    highlight: function(element, options){
        element = $(element);
        new Effect.Highlight(element, options);
        return element;
    }
};

$w('fade appear grow shrink fold blindUp blindDown slideUp slideDown ' +
'pulsate shake puff squish switchOff dropOut').each(function(effect){
    Effect.Methods[effect] = function(element, options){
        element = $(element);
        Effect[effect.charAt(0).toUpperCase() + effect.substring(1)](element, options);
        return element;
    }
});

$w('getInlineOpacity forceRerendering setContentZoom collectTextNodes collectTextNodesIgnoreClass getStyles').each(function(f){
    Effect.Methods[f] = Element[f];
});

Element.addMethods(Effect.Methods);