/*	
	Chris Zegelin, started Mar 2009
	Thanks to Larry Ullman
*/

/*	This page creates an Ajax request object.
 *	This page is included by other pages that 
 *	need to perform an XMLHttpRequest.
 */

// Initialize the object:
var ajax = false;

// Create the object...

// Choose object type based upon what's supported:
if( window.XMLHttpRequest ){

	// IE 7, Mozilla, Safari, Firefox, Opera, most browsers:
	ajax = new XMLHttpRequest();
}

else if( window.ActiveXObject ){ // Older IE browsers

	// Create type Msxml2.XMLHTTP, if possible:
	try{
		ajax = new ActiveXObject("Msxml2.XMLHTTP");
	}
	catch( e1 ) { // Create the older type instead:
		try{
			ajax = new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch( e2 ) { }
	}
}

// Send an alert if the object wasn't created.
if( !ajax ){
	alert( 'Some page functionality is unavailable.' );
}