var xmlHttp3;

function showAct(str,str2)
{ 
xmlHttp3=GetXmlHttpObject();
if (xmlHttp3==null)
 {
 alert ("Browser does not support HTTP Request");
 return;
 }
var url="activitat.php";
url=url+"?Cod_not="+str+"&Cod_img2="+str2;
url=url+"&sid="+Math.random();
if(str!='0'){
document.getElementById("txtHint4").innerHTML='';
document.getElementById("txtHint5").innerHTML='';
document.getElementById("txtHint3").innerHTML='<div align="center"><br><br><img src="images/ajax-loader.gif" alt="" border="0"></div>';
}
xmlHttp3.onreadystatechange=stateChanged3;
xmlHttp3.open("GET",url,true);
xmlHttp3.send(null);
}

function stateChanged3() 
{ 
if (xmlHttp3.readyState==4 || xmlHttp3.readyState=="complete")
 { 
 document.getElementById("txtHint3").innerHTML=xmlHttp3.responseText;
 }
}

function GetXmlHttpObject()
{
var xmlHttp3=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 xmlHttp3=new XMLHttpRequest();
 }
catch (e)
 {
 //Internet Explorer
 try
  {
  xmlHttp3=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp3=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp3;
}