var OpacityDropdown = {
	
	intervals: 10,
	menues: [],
	
	start: function(div)	{
		var div = document.getElementById(div);
		var end = div.getElementsByTagName("div").length;
		while(end--)	{
			var ddItem = div.getElementsByTagName("div")[end];
			if(ddItem.className.indexOf("ddItem") != -1 && ddItem.getElementsByTagName("div").length != 0 && ddItem.getElementsByTagName("a").length != 0)	{
				this.createDropdown(ddItem);
			}
		}
	},
	createDropdown: function(div)	{
		var index = this.menues.length;
		var dropdown = {
			
			ddItem: div,
			className: div.className,
			a: div.getElementsByTagName("a")[0],
			div: div.getElementsByTagName("div")[0],
			
			start: function()	{
				if(navigator.appName == "Netscape")	{
					this.div.style.opacity = 0;
					this.div.style.filter = "alpha(opacity=0)";
				}
				this.div.style.display = "none";
				this.interval = 0;
				this.status = "hidden";
				this.ddItem.onmouseover = function()	{
					OpacityDropdown.show(index);
				}
				this.ddItem.onmouseout = function()	{
					OpacityDropdown.menues[index].hideTimeout = setTimeout("OpacityDropdown.menues["+index+"].hide()", 100);
				}
			},
			
			show: function()	{
				this.div.style.display = "block";
				if(typeof(this.hideTimeout) != "undefined")	{
					clearTimeout(this.hideTimeout);
				}
				if(navigator.appName == "Netscape")	{
					if(typeof(this.hideInterval) != "undefined")	{
						clearTimeout(this.hideInterval);
					}
					if(typeof(this.showInterval) != "undefined")	{
						clearTimeout(this.showInterval);
					}
					this.status = "shown";
					OpacityDropdown.menues[index].incrementOpacity();
				}
			},
			
			incrementOpacity: function()	{
				if(this.interval < 9)	{
					this.div.style.opacity = (this.interval+1) / 10;
					this.div.style.filter = "alpha(opacity="+(this.interval+1) * 10+")";
				}
				if(this.interval < 10)	{
					this.interval++;
					this.showInterval = setTimeout("OpacityDropdown.menues["+index+"].incrementOpacity();", 40);
				}
			},
			
			hide: function()	{
				if(navigator.appName == "Netscape")	{
					if(typeof(this.hideInterval) != "undefined")	{
						clearTimeout(this.hideInterval);
					}
					if(typeof(this.showInterval) != "undefined")	{
						clearTimeout(this.showInterval);
					}
					OpacityDropdown.menues[index].decrementOpacity();
				}
				else	{
					this.div.style.display = "none";
				}
			}, 
			
			decrementOpacity: function()	{
				if(this.interval < 11)	{
					this.div.style.opacity = (this.interval-1) / 10;
					this.div.style.filter = "alpha(opacity="+(this.interval-1) * 10+")";
				}
				if(this.interval > 0)	{
					this.interval--;
					this.hideInterval = setTimeout("OpacityDropdown.menues["+index+"].decrementOpacity();", 40);
				}
				else	{
					this.div.style.display = "none";
					this.status = "hidden";
				}
			}
			
		}
		dropdown.start();
		this.menues[index] = dropdown;
	},
	
	show: function(menu)	{
		
		var end = this.menues.length;
		while(end--)	{
			if(end == menu)	{
				this.menues[end].show();
			}
			else if(this.menues[end].status == "shown")	{
				this.menues[end].hide();
			}
		}
		
	}
	
}