Funcion CrossBrowsing para agregar Event Listener

/* addEvent handler for IE and other browsers */

function addEvent(elm, evType, fn, useCapture)
{
if (elm.addEventListener){
elm.addEventListener(evType, fn, useCapture);
return true;
} else if (elm.attachEvent){
var r = elm.attachEvent(«on»+evType, fn);
return r;
}
}

addEvent(document.getElementById(«face»),’mouseover’, laFuncion );

ó
addEvent(document.getElementById(«face»),’mouseout’, function(){ document.getElementById(«facebookliketelva»).style.height = «»; } );