var xmlhttp;
var idchange;
function showPic(str,value,f)
{
idchange = str;   
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("Browser does not support HTTP Request");
  return;
  }
var url="ajax/pic.php";
url=url+"?pic="+value+"&f="+f;
url=url+"&sid="+Math.random();
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",url,true);
xmlhttp.send(null);
}

function stateChanged()
{
if (xmlhttp.readyState==4)
{
document.getElementById(idchange).innerHTML=xmlhttp.responseText;
}
}