function getAjaxObject() {
	var xmlHttp;
	try {
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}
	catch (e) {
		// Internet Explorer
		try {
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e) {
			try {
				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch (e) {
				//alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}
	return xmlHttp;
}

xmlHttp = getAjaxObject();

if (typeof xmlHttp != "object" && xmlHttp == false) {
	var ajaxAvailable = false;
}
else {
	var ajaxAvailable = true;
}