var xmlHttp;
function test()
{
document.getElementById("retText").innerHTML="vv";
}
function ajaxFunction(startno)
{
var myURL = "getdata.php?fno="+startno;
xmlHttp=GetXmlHttpObject();
if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 
  xmlHttp.onreadystatechange=stateChanged;
  xmlHttp.open("GET",myURL,true);
  xmlHttp.send(null);
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4) {
	document.getElementById("retText").innerHTML=xmlHttp.responseText;
	}
}

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;
}