var xmlhttp
function UrlCheckSet(idnum){
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null){
  return;
}
var url="adb.php";
url=url+"?id="+idnum;
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}
function stateChanged(){
 return;
}
function GetXmlHttpObject(){
  if (window.XMLHttpRequest){
    return new XMLHttpRequest();
  }
  if (window.ActiveXObject){
    return new ActiveXObject("Microsoft.XMLHTTP");
  }
  return null;
}