var request = null;

function CreateRequest()
{
	try
	{
		request = new XMLHttpRequest();
	}
	catch (trymicrosoft)
	{
		try
		{
			request = new ActiveXObject("Msxml12.XMLHTTP");
		}
		catch (othermicrosoft)
		{
			try
			{
				request = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (failed)
			{
				request = null;
			}
		}
	}
	if(request == null)
	{
		alert("Error creating request object.");
	}
}