Multiple AJAX-calls at the same time, dont get it to work

Hi!

I'm trying to call multiple AJAX calls at the same time.

The problem is that only the latest call seems to update the page properly.
Any1 who could help me =>?

This is my code:

var xmlHttps, xmlHttps1, xmlHttps2, sTargetDiv, targeturl, getvar1;


function ajax(geturl,divtagg,get1,get2,get3,get4,get5)
{
xmlHttp=GetXmlHttpObject();

if (xmlHttp==null)
{
alert ("Din webläsare stödjer inte ajax. Byt till IE 7.0, firefox,opera eller safari.");
return;
}

sTargetDiv=divtagg
targeturl=geturl
getvar1 = get1
var url=targeturl+"?get1="+get1+"&get2="+get2+"&get3="+get3+"&get4="+get4+"&get5="+get5+"&sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged;
document.getElementById(sTargetDiv).innerHTML="<img src='loading.gif'>";
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}



function stateChanged()
{
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{
document.getElementById(sTargetDiv).innerHTML=xmlHttp.responseText
if(xmlHttp.responseText == "Bilden togs bort")
{
removeByID("image"+getvar1)
}
}
}

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;
}

function ajaxPro(geturl1,divtagg1,geturl2,divtagg2)
{
ajax(geturl1,divtagg1,1);
ajax(geturl2,divtagg2,2);
}