sfHover  = function() {
	var sfEls  = document.getElementById("nav").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"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

////////////////////////////////
function suena(elDiv, laCancion){
var text='<embed  width=0 height=0 src="' + laCancion+'" hidden="true" loop="false" autostart="true"></embed>';
document.getElementById(elDiv).innerHTML=text;
}