var Ptr=document.getElementById("tab").getElementsByTagName("li");
 
for(var i=0;i<Ptr.length;i++) { 

Ptr[i].onmouseover=function(){ 
this.tmpClass=this.className; 
this.className = "secinfor02"; 
}; 
Ptr[i].onmouseout=function(){ 
this.className=this.tmpClass; 
}; 
}