var XHttpRequest =
{
	exec: function() 
	{
	var requester = null;
	try
	{
	  requester = new XMLHttpRequest();
	}
	catch (error)
	{
	  try
	  {
	    requester = new ActiveXObject("Microsoft.XMLHTTP");
	  }
	  catch (error)
	  {
	    requester = null;
	  }
	}
	return requester;
	}
};