// JavaScript Document
var xmlHttp
function show_category(str)
{
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("ÄúµÄä¯ÀÀÆ÷²»Ö§³ÖAJAX£¡");
  return;
  }
var url="ajax_output.php";
url=url+"?act=index_jobscategory";
url=url+"&category_id="+str;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}
function stateChanged()
{
if (xmlHttp.readyState==4 && xmlHttp.status==200)
{
$("subclass").innerHTML=xmlHttp.responseText;
}
}
function $(s) {
    return document.getElementById(s);
}
function $$(s) {
    return document.getElementsByName(s);
}
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;
}