function GetXMLHttpRequest()
{
	var xmlHttp;
	try
	  {        
		xmlHttp=new XMLHttpRequest();    // Firefox, Opera 8.0+, Safari
	  }
	catch (e)
	{        
		try								// Internet Explorer
	    {      
	    xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
	    }
		catch (e)
	    {      
			try
			{        
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");        
			}
			catch (e)
			{        
				alert("Your browser does not support AJAX!");        
				return false;        
			}      
		}    
	}
	return (xmlHttp)
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}