function initPage() {
 initDropDown();
}
function initDropDown()
{
 var nav = document.getElementById("nav");
 if(nav) {
  var lis = nav.getElementsByTagName("li");
  for (var i=0; i<lis.length; i++) {
   if(lis[i].getElementsByTagName("ul").length > 0) {
    lis[i].className += " has-drop-down"
    lis[i].getElementsByTagName("a")[0].className += " has-drop-down-a"
   }
   lis[i].onmouseover = function() {
    this.className += " hover";
   }
   lis[i].onmouseout = function() {
    this.className = this.className.replace(" hover", "");
   }
  }
 }
}
if (window.addEventListener)
 window.addEventListener("load", initPage, false);
else if (window.attachEvent)
 window.attachEvent("onload", initPage)