function SetTopMenuStyle(sender, hover) {
	for (var i=0; i<sender.childNodes.length; i++) {
		if (sender.childNodes[i].className=="hovercontainer") {
			sender.childNodes[i].style.display=hover?"inline":"none";
			break;
		}
	}
}
function InitTopMenu() {
	var mainitems =  getElementsByClassName(document.getElementById("topmenu"), "td", "item");
	for (i=0; i<mainitems.length; i++) {
		mainitems[i].onmouseover = function() { SetTopMenuStyle(this, true); }
		mainitems[i].onmouseout = function() { SetTopMenuStyle(this, false); }
	}
	var submenuitems = getElementsByClassName(document.getElementById("topmenu"), "div", "menuitem");
	for (i=0; i<submenuitems.length; i++) {
		submenuitems[i].onmouseover = function() { this.className="menuitem_hover"; }
		submenuitems[i].onmouseout = function() { this.className="menuitem"; }
	}
}