function createRequestObject()
{
	//Set XML Object, depending on Browser support
	
	var xhr = null;
	
	if (window.XMLHttpRequest)     // Object of the current windows
		xhr = new XMLHttpRequest();     // Firefox, Safari, ... 
	else if (window.ActiveXObject)   // ActiveX version
			xhr = new ActiveXObject("Microsoft.XMLHTTP");  // Internet Explorer 
	else
		alert('Your browser does not support Ajax.');

	return xhr;
}