/**
 * @author Petre
 */

 function showMenu(){
 	var lis = document.getElementById("menu").getElementsByTagName("li");
	var len = lis.length;
	for(var i=0;i<len;i++){
		lis[i].onmouseover = function(){
			if (this.getElementsByTagName("ul")[0]) {
				this.getElementsByTagName("ul")[0].style.display = "block";
			}
		};
		lis[i].onmouseout = function(){
			if (this.getElementsByTagName("ul")[0]) {
				this.getElementsByTagName("ul")[0].style.display = "none";
			}
		};
	}
 }

 window.onload = showMenu;