function show(num,total,tab)
{
    for (i = 1; i <= total; i++) {
        document.getElementById(tab+"item" + i).className = "item";
    }
    document.getElementById(tab+"item" + num).className = "iteminit";
    
    for (i = 1; i <= total; i++) {
        document.getElementById(tab+"sub" + i).style.display = "none";
    }
    document.getElementById(tab+"sub" + num).style.display = "block";
}

function showtab(num,total,tab)
{
    for (i = 1; i <= total; i++) {
        document.getElementById(tab+"item" + i).className = "ctab";
    }
    document.getElementById(tab+"item" + num).className = "ctabinit";
    
    for (i = 1; i <= total; i++) {
        document.getElementById(tab+"sub" + i).style.display = "none";
    }
    document.getElementById(tab+"sub" + num).style.display = "block";
}

function showContent(num,total,tab)
{
    for (i = 1; i <= total; i++) {
        document.getElementById(tab+"item" + i).className = "ttab";
    }
    document.getElementById(tab+"item" + num).className = "ttabinit";
    
    for (i = 1; i <= total; i++) {
        document.getElementById(tab+"sub" + i).style.display = "none";
    }
    document.getElementById(tab+"sub" + num).style.display = "block";
}

function GetXmlHttpObject()
{
    var xmlHttp=null;
    try
      {
      // Firefox, Opera 8.0+, Safari
      xmlHttp=new XMLHttpRequest();
      }
    catch (e)
      {
      // Internet Explorer
      try
        {
        xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
        }
      catch (e)
        {
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
  }
return xmlHttp;
}

function getcontent()
{
    var xmlHttp=GetXmlHttpObject();
    if (xmlHttp==null)
      {
      alert ("您的浏览器不支持AJAX！");
      return;
      } 
    var url="action/getcontent.aspx";
    url=url+"?date="+new Date();
    xmlHttp.onreadystatechange=stateChanged;
    xmlHttp.open("GET",url,true);
    xmlHttp.send(null);
    function stateChanged()
    { 
        if (xmlHttp.readyState==4)
        {
            document.getElementById("contents").innerHTML=xmlHttp.responseText;
        }
    }
}