var xmlHttpfunction;
function showAvatar(str) { 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return;
 } 
var url="avatar.php"
url=url+"?url="+str
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") { 
	if(xmlHttp.responseText == "error") {
		item = document.getElementById('tdAvatar');
		item.innerHTML = '';
	}else{
		item = document.getElementById('tdAvatar');
		newitem = document.createElement('img');
		newitem.src = xmlHttp.responseText;
		newitem.style.width = "100px";
		newitem.style.height = "100px";
		newitem.style.border = "1px solid black";
		item.innerHTML = '';
		item.appendChild(newitem);
	}
} 
}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;
}