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

            if(document.getElementById("menu_iframe")) {
            	var iframe = document.getElementById("menu_iframe");
            	var submenu = this.getElementsByTagName("UL");
            	if(submenu.length) {
            		iframe.style.top = submenu[0].offsetTop + this.offsetTop;
            		iframe.style.left = submenu[0].offsetLeft + this.offsetLeft;
            		iframe.style.width = submenu[0].scrollWidth;
            		iframe.style.height = submenu[0].clientHeight;
            		iframe.style.display = "inline";
            	}
            }
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
			if(document.getElementById("menu_iframe")){
				var iframe = document.getElementById("menu_iframe");
				iframe.style.display = "none";
			}
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);