// JavaScript Document
	var showErrors = true;
	var cache = new Array();
	function NewXmlHttpRequestObject()  {
		// will store the reference to the XMLHttpRequest object
		var xmlHttp;
		// this should work for all browsers except IE6 and older
		try {
			// try to create XMLHttpRequest object
			xmlHttp = new XMLHttpRequest();
		}
		catch(e) {
			// assume IE6 or older
			var XmlHttpVersions = new Array("MSXML2.XMLHTTP.6.0",
											"MSXML2.XMLHTTP.5.0",
											"MSXML2.XMLHTTP.4.0",
											"MSXML2.XMLHTTP.3.0",
											"MSXML2.XMLHTTP",
											"Microsoft.XMLHTTP");
			// try every prog id until one works
			for (var i=0; i<XmlHttpVersions.length && !xmlHttp; i++) {
				try { 
				// try to create XMLHttpRequest object
					xmlHttp = new ActiveXObject(XmlHttpVersions[i]);
				} 
				catch (e) {} // ignore potential error
			}
		}
		// return the created object or display an error message
		if (!xmlHttp)
			alert("Error creating the XMLHttpRequest object.");
		else 
			return xmlHttp;
	}

	// function that displays an error message
	function displayError($message) {
		// ignore errors if showErrors is false
		if (showErrors) {
			// turn error displaying Off
			showErrors = false;
			// display error message
			alert("Error encountered: \n" + $message);
		}
	}