// JavaScript Document

//获取ID
function Y(al)
{
	    return eval('document.getElementById("'+al+'")');		
}
//改变样式
function ChangClass(uid,css,num)
{   
  var tabList = document.getElementById(uid).getElementsByTagName("li");
  
for(i=0; i<tabList.length; i++)
{
  if (i==num )
  { 

  tabList[i].className =css;
  document.getElementById("subNav"+i+"").style.display="block";

  }else{
      tabList[i].className ="none"; 
      document.getElementById("subNav"+i+"").style.display="none";

      }
} 

}