function load_window(strWindow){
  switch(strWindow){
    case "livesupport":
      window.open("/livesupport/","livesupport","status=0,toolbar=0,location=0,menubar=1,directories=0,resizable=0,scrollbars=1,height=400,width=350");
      break;
  }
}

function build_ajax_object(){
  var objAJAX;
  if(window.XMLHttpRequest)
    objAJAX=new XMLHttpRequest();
  else if(window.ActiveXObject)
    objAJAX=new ActiveXObject("Microsoft.XMLHTTP");
  else
    objAJAX=null;
  return objAJAX;
}