function IEHoverPseudo() {

var navItems = document.getElementById("primary").getElementsByTagName("li");

for (var i=0; i<navItems.length; i++) {
  if(navItems[i].className == "menuparent") {
    navItems[i].onmouseover=function() { this.className += " over"; }
    navItems[i].onmouseout=function() { this.className = "menuparent"; }
    }
  }

}
window.onload = IEHoverPseudo;