function getXMLHttpRequestObject()
{
	var ajax=false;
	if(window.XMLHttpRequest)
	{
		ajax=new XMLHttpRequest();
	}
	else if(window.ActiveXObject)
	{
		try
		{
			ajax=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e)
		{
			try
			{
				ajax=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e) {}
		}
	}
	return ajax;
}