function sfHover() {
	if(document.getElementById("opciones1")){
		var sfEls = document.getElementById("opciones1").getElementsByTagName("li");
		for (var i=0; i<sfEls.length; i++) {
			sfEls[i].onmouseover=function() {
				this.className+=" sfhover";
			}
			sfEls[i].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
			}
		}
		var allUl = document.getElementById("opciones1").getElementsByTagName("ul");
		for(i=0;i<allUl.length;i++){
			if(allUl[i].className.match("opciones2") != null) {
				var sfEls2 = allUl[i].getElementsByTagName("li");
				for ( j=0; j<sfEls2.length; j++) {
					sfEls2[j].onmouseover=function() {
						this.className+=" encimaLi";
					}
					sfEls2[j].onmouseout=function() {
						this.className=this.className.replace(/encimaLi/g, "");
					}
				}
			}
		}
	}
	/* if(document.getElementById("opciones2")){
		var sfEls2 = document.getElementById("opciones2").getElementsByTagName("li");
		for (var j=0; j<sfEls2.length; j++) {
			sfEls2[j].onmouseover=function() {
				this.className+=" encimaLi";
			}
			sfEls2[j].onmouseout=function() {
				this.className=this.className.replace(new RegExp(" encimaLi\\b"), "");
			}
		}
	} */
}