sfHover = function() {
	var sfEls = document.getElementById("nav").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {

      if(this.className != 'bottom_border'){
        
        this.className+=" sfhover";	
        
      }   
      
      document.getElementById("top_menu_custom_products").style.backgroundPosition = "0 -45px";
  	}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
			document.getElementById("top_menu_custom_products").style.backgroundPosition = "0 0";
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

function turnOn(){

  document.getElementById("top_menu_custom_products").style.backgroundPosition = "0 -45px";

}

function turnOff(){

  document.getElementById("top_menu_custom_products").style.backgroundPosition = "0 0";

}