Uso di setTimeout() in un menu a comparsa

[andr3a]

function menuEnable()  {
	for(var	
		i = 0,
		lstItem = document.getElementById("navigation").getElementsByTagName("div"),
		showLst = function(lst, cname){return function(){lst.className = cname}};
		i < lstItem.length;
		i++
	){
		lstItem[i].onmouseover = function()  {
			if(this.ID)
				clearTimeout(this.ID);
			this.lst = this.getElementsByTagName("ul").item(0);
			this.ID = setTimeout(showLst(this.lst, "show"), 500);
		};
		lstItem[i].onmouseout = function()  {
			clearTimeout(this.ID);
			this.ID = setTimeout(showLst(this.lst, "hide"), 500);
		};
	};
};