sfHover = function() {
  var sfEls = document.getElementById("primary_nav").getElementsByTagName("li");
  for (var i=0; i<sfEls.length; i++) {
    //ONMOUSEOVER
    sfEls[i].onmouseover = function() {
    	//Close all other menus first
    	for(var j=0; j<sfEls.length; j++){
    		if(j != i){	sfEls[j].className = sfEls[j].className.replace(new RegExp(" sfhover\\b"), ""); }
    	}
    	//Open this one
      this.className += " sfhover";
    }
    //ONMOUSEOUT
    sfEls[i].onmouseout = function() {
    		this.className = this.className.replace(new RegExp(" sfhover\\b"), "");
     }
  }
  
//	  var sfBlock = document.getElementById("primary_nav").childNodes;
//	  
//	  sfBlock[0].onmouseout = function () {
//				alert(sfBlock[0].nodeName);
//		}
  
}

if (window.attachEvent) {
  window.attachEvent("onload", sfHover);
}