/**************************************************************

	Script		: Overlay
	Version		: 1.2
	Authors		: Samuel birch
	Desc		: Covers the window with a semi-transparent layer.
	Licence		: Open Source MIT Licence

	Modified: Leonardo Di Lella (leonardo@dilella.org) - MooTools 1.2 support

**************************************************************/

var Overlay = new Class({
	
    getOptions: function(){
        return {
            colour: '#000',
            opacity: 0.7,
            zIndex: 1,
            container: document.body,
            onClick: new Class()
        };
    },

    initialize: function(options){
        this.setOptions(this.getOptions(), options);
		
        this.options.container = $(this.options.container);
		
        this.container = new Element('div').setProperty('id', 'OverlayContainer').setStyles({
            position: 'fixed',
            left: '0px',
            top: '0px',
            width: '100%',
            visibility: 'hidden',
            opacity: 0,
            overflow: 'hidden',
            zIndex: this.options.zIndex
        }).inject(this.options.container,'inside');
		
        this.iframe = new Element('iframe').setProperties({
            'id': 'OverlayIframe',
            'name': 'OverlayIframe',
            'src': 'javascript:void(0);',
            'frameborder': 1,
            'scrolling': 'no'
        }).setStyles({
            'position': 'absolute',
            'top': 0,
            'left': 0,
            'width': '100%',
            'height': '100%',
            'filter': 'progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)',
            'opacity': 0,
            'zIndex': 1
        }).inject(this.container,'inside');
		
        this.overlay = new Element('div').setProperty('id', 'Overlay').setStyles({
            position: 'absolute',
            left: '0px',
            top: '0px',
            width: '100%',
            height: '100%',
            zIndex: 2,
            backgroundColor: this.options.colour
        }).inject(this.container,'inside');
		
        this.container.addEvent('click', function(){
            this.options.onClick();
        }.bind(this));
		
        //this.fade = new Fx.Morph(this.container, 'opacity').set(0);
        this.position();
		
        window.addEvent('resize', this.position.bind(this));
    },
	
    position: function(){ 
        //if(this.options.container == document.body){ 
        //	var h = document.getScrollSize().x+'px'; 
        //this.container.setStyles({top: '0px', height: h});
        //	this.container.setStyles({top: '0px', height: '100%'});
			
        if(this.options.container == document.body){
            var h = document.getScrollSize().y+'px';
            this.container.setStyles({
                top: '0px', 
//                'height': h,
                'bottom':'0',
                'right':'0'
            });
        //this.container.setStyles({top: '0px', height: '100%'});
        }else{ 
            var myCoords = this.options.container.getCoordinates(); 
            this.container.setStyles({
                top: myCoords.top+'px', 
                height: myCoords.height+'px', 
                left: myCoords.left+'px', 
                width: myCoords.width+'px'
            }); 
        } 
    },
	
    show: function(){
        //	this.fade.start({'opacity':[0,this.options.opacity], 'visibility':'visible'});
        this.container.fade(this.options.opacity);
    },
	
    hide: function(){
        //this.fade.start({'opacity':[this.options.opacity,0], 'visibility':'hidden'});
        this.container.fade('out');
    }
	
});
Overlay.implement(new Options);

/*************************************************************/