function f8page()
{
   var url = document.f8.pg.options[document.f8.pg.selectedIndex].value; 
   window.location.href = url;
}

function menuFix() {
 var sfEls = document.getElementById("nav").getElementsByTagName("li");
 for (var i=1; i<sfEls.length; i++) {
  sfEls[i].onmouseover=function() {
  this.className=(this.className.length>0? " ": "") + "hover";
  }
  sfEls[i].onmouseout=function() {
  this.className=this.className.replace(new RegExp("( ?|^)hover\\b"),"");
  }
 }
}
if (document.all){
window.attachEvent('onload',menuFix)//对于IE
}
else{
window.addEventListener('load',menuFix,false);//对于FireFox
}