// JavaScript Document
//首页产品分类
if (document.getElementById("nav_hover")){
var sfEls = document.getElementById("nav_hover").getElementsByTagName("li");
for (var i=0; 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"), 
"");
}
}
}