function dispMenu(text, value){
	var id = "mn" + text.replace(/ /, "_");
	var menu = document.getElementById(id);
	menu.style.display = value;
}
var navTitle = document.getElementById("mainNav");
var allNavLinks = navTitle.getElementsByTagName("a");
var allMenus = navTitle.getElementsByTagName("ul");
for(var i = 0;i < allMenus.length;i ++){
	allMenus[i].onmouseover = function(){
		this.style.display = "inline";
	}
	allMenus[i].onmouseout = function(){
		this.style.display = "none";
	}
}
for(var i = 0;i < allNavLinks.length;i ++){
	if("btTitle" == allNavLinks[i].className){
		allNavLinks[i].onmouseover = function(){
			dispMenu(this.innerHTML, "inline");
		}
		allNavLinks[i].onmouseout = function(){
			dispMenu(this.innerHTML, "none");
		}
	}
}