var xmlHttp3

function hist(str)
{ 
xmlHttp4=GetXmlHttpObject();
if (xmlHttp4==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
var url4="hist.asp";
url4=url4+"?y="+str;
xmlHttp4.onreadystatechange=stateChanged4;
xmlHttp4.open("GET",url4,true);
xmlHttp4.send(null);


}

function stateChanged4() 
{ 
if (xmlHttp4.readyState==4)
{ 
document.getElementById("histl").innerHTML=xmlHttp4.responseText;
}
}