// JavaScript Document

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function find_parents() {
	var nav = document.getElementById(nav_ul);
	var items = nav.getElementsByTagName("ul");
	for (var i=0; i<items.length; i++) {
		//alert(items[i].parentNode.getAttribute("title"));
		items[i].parentNode.onmouseover = function() {
			show_submenu(this);
		}
		items[i].parentNode.onmouseout = function() {
			hide_all();
		}
		items[i].parentNode.getElementsByTagName("a")[0].onclick = function() {
			return false;
		}
	}
}

function show_submenu(li) {
	li.getElementsByTagName("ul")[0].style.display = "block";
}

function hide_all() {
	var nav = document.getElementById(nav_ul);
	var items = nav.getElementsByTagName("ul");
	for (var i=0; i<items.length; i++) {
		items[i].style.display = "none";
	}
	
}


var nav_ul = "nav";
addLoadEvent(find_parents);