var xmlHttp

function showHint(str,upDiv)
{
if (str.length==0)
  { 
  document.getElementById(upDiv).innerHTML="";
  return;
  }
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url="_result.php";
url=url+"?lastname="+str;
url=url+"&sid="+Math.random();
xmlHttp.onreadystatechange=function() {
if (xmlHttp.readyState==4)
{ 
document.getElementById(upDiv).innerHTML=xmlHttp.responseText;
}
}
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
} 



function GetXmlHttpObject(upDiv)
{
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 hlt_back(ctrl) {
	ctrl.style.backgroundColor = "#CCCCCC";
}
function unhlt_back(ctrl) {
	ctrl.style.backgroundColor = "";
}