// ÊÖ¶¯Çл»
function chkCss(thisObj,Num)
{
if(thisObj.className == "on")return;   
var tabObj = thisObj.parentNode.id;
var tabList = document.getElementById(tabObj).getElementsByTagName("li");
for(i=0; i <tabList.length; i++)
{
if (i == Num)
{
thisObj.className = "on";
document.getElementById(tabObj+"_"+i).style.display = "block";
}else
{
tabList[i].className = "";
document.getElementById(tabObj+"_"+i).style.display = "none";
}
}
}