Object.extend(Element, {
	getWidth: function(element) {
	   	element = $(element);
	   	return element.offsetWidth; 
	},
	setWidth: function(element,w) {
	   	element = $(element);
    	element.style.width = w +"px";
	},
	setHeight: function(element,h) {
   		element = $(element);
    	element.style.height = h +"px";
	},
	setTop: function(element,t) {
	   	element = $(element);
    	element.style.top = t +"px";
	},
	setLeft: function(element,l) {
	   	element = $(element);
    	element.style.left = l +"px";
	},
	setSrc: function(element,src) {
    	element = $(element);
    	element.src = src; 
	},
	setHref: function(element,href) {
    	element = $(element);
    	element.href = href; 
	},
	setInnerHTML: function(element,content) {
		element = $(element);
		element.innerHTML = content;
	}
});


var LightOverlay = Class.create({ 
  
	initialize: function(){
	  
	  if( !$("lightoverlay") ){
	  	this.Start();
	  }
	  
		var arrayPageSize = this.getPageSize();
		Element.setWidth('lightoverlay', arrayPageSize[0]);
		Element.setHeight('lightoverlay', arrayPageSize[1]);

		new Effect.Appear('lightoverlay', { duration: 0.3, from: 0.0, to: 0.6 });
	  
		var selects = document.getElementsByTagName("select");
		for (i = 0; i != selects.length; i++) {
			selects[i].style.visibility = "hidden";
		}
	  
		var flashObjects = document.getElementsByTagName("object");
		for (i = 0; i < flashObjects.length; i++) {
			flashObjects[i].style.visibility = "hidden";
		}
	
		var flashEmbeds = document.getElementsByTagName("embed");
		for (i = 0; i < flashEmbeds.length; i++) {
			flashEmbeds[i].style.visibility = "hidden";
		}
	  
	},
	
	Start: function(){
		
		var objBody = document.getElementsByTagName("body").item(0);
		
	  var objOverlay = document.createElement("div");
		objOverlay.setAttribute('id','lightoverlay');
		objOverlay.style.display = 'none';
		//objOverlay.onclick = function() { Overlay.Hide(); }
		objBody.appendChild(objOverlay);	  
	  
	},
	
	Hide: function(){
	  
	  new Effect.Fade('lightoverlay', { duration: 0.2});
	  
		var selects = document.getElementsByTagName("select");
		for (i = 0; i != selects.length; i++) {
			selects[i].style.visibility = "visible";
		}
	  
		var flashObjects = document.getElementsByTagName("object");
		for (i = 0; i < flashObjects.length; i++) {
			flashObjects[i].style.visibility = "visible";
		}
	
		var flashEmbeds = document.getElementsByTagName("embed");
		for (i = 0; i < flashEmbeds.length; i++) {
			flashEmbeds[i].style.visibility = "visible";
		}
	  
	},
	
	getPageScroll: function(){
	
		var xScroll, yScroll;
	
		if (self.pageYOffset) {
			yScroll = self.pageYOffset;
			xScroll = self.pageXOffset;
		} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
			yScroll = document.documentElement.scrollTop;
			xScroll = document.documentElement.scrollLeft;
		} else if (document.body) {// all other Explorers
			yScroll = document.body.scrollTop;
			xScroll = document.body.scrollLeft;	
		}
	
		arrayPageScroll = new Array(xScroll,yScroll) 
		return arrayPageScroll;
	},
	
	getPageSize: function(){
		
		var xScroll, yScroll;
		
		if (window.innerHeight && window.scrollMaxY) {	
			xScroll = window.innerWidth + window.scrollMaxX;
			yScroll = window.innerHeight + window.scrollMaxY;
		} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
			xScroll = document.body.scrollWidth;
			yScroll = document.body.scrollHeight;
		} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
			xScroll = document.body.offsetWidth;
			yScroll = document.body.offsetHeight;
		}
		
		var windowWidth, windowHeight;
	
		if (self.innerHeight) {	// all except Explorer
			if(document.documentElement.clientWidth){
				windowWidth = document.documentElement.clientWidth; 
			} else {
				windowWidth = self.innerWidth;
			}
			windowHeight = self.innerHeight;
		} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
			windowWidth = document.documentElement.clientWidth;
			windowHeight = document.documentElement.clientHeight;
		} else if (document.body) { // other Explorers
			windowWidth = document.body.clientWidth;
			windowHeight = document.body.clientHeight;
		}	
	
		if(yScroll < windowHeight){
			pageHeight = windowHeight;
		} else { 
			pageHeight = yScroll;
		}
	
		if(xScroll < windowWidth){	
			pageWidth = xScroll;		
		} else {
			pageWidth = windowWidth;
		}
	
		arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
		return arrayPageSize;
	}
  
  
});