// initialize AJAX object
	
var ajax = false;
if(window.XMLHttpRequest) {
	ajax = new XMLHttpRequest();
} else if (window.ActiveXObject) {
	try {
		ajax = new ActiveXObject("Msxm12.XMLHTTP");
	} catch (e1) {
		try {
			ajax = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (e2) {}
	}
}

if (!ajax) {
	alert("Some page functionality is unavailable");
}