// ajax.js
function getXMLHttpRequestObject() {

	var ajax = false;

	if (window.XMLHttpRequest) {
	
		ajax = new XMLHttpRequest();
		
	} else if (window.ActiveXObject) {
		
		try {
			ajax = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) { 
			try {
				ajax = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) { }
		}
		
	} 

	return ajax;
}