//create AJAX Request Object, cross browser compatibility.
function getHTTPObject() {
	var http_object;
	if (window.XMLHttpRequest)
	{
		http_object = new XMLHttpRequest()
	}
	else if (window.ActiveXObject){ // if IE
		try {
			http_object = new ActiveXObject("Msxml2.XMLHTTP")
		} 
		catch (e){
			try{
				http_object = new ActiveXObject("Microsoft.XMLHTTP")
			}
			catch (e){
				http_object = false;
				}
		}
	}
	else
		http_object = false;
	
	return http_object;
}