i am trying to Use this

```
function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}

function CallSomePHP()
{
    xmlhttp=GetXmlHttpObject();
    if (xmlhttp==null)
    {
    alert ("Browser does not support HTTP Request");
    return;
    }
    var url="myPhp.php"; ***(Need to Pass multiple parameter to php from here)***
    xmlhttp.onreadystatechange=stateChanged;
    xmlhttp.open("GET",url,true);
    xmlhttp.send(null);
}

function stateChanged()
{
    if (xmlhttp.readyState==4)
    {
        alert(xmlhttp.responseText); 

```