check reg

<script language="javascript" type="text/javascript">
var aaa;
function ck(regid)
{
      aaa=new ActiveXObject("Msxml2.XMLHTTP.3.0");
      aaa.onreadystatechange=bbb;
      aaa.open("GET","chaxun.aspx?id="+regid,true);
      aaa.send(null);
 }
 function bbb()
 {
      if(aaa.readyState==4)
      {
        document.getElementById("tishi").innerHTML=aaa.responseText;
          // alert(aaa.responseText);
     } 
 }  
</script>