function nTabs(thisObj,Num){ 
    if(thisObj.className == "active")
        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 = "active"; 
            document.getElementById(tabObj+"_Content"+i).style.display = "block"; 
        }else{ 
            tabList[i].className = "normal"; 
            document.getElementById(tabObj+"_Content"+i).style.display = "none"; 
        } 
    } 
}