function getxmlhttp(){
	var xmlhttp = new Object();
	if (window.XMLHttpRequest && !(window.ActiveXObject)) {
		xmlhttp = new XMLHttpRequest();
		xmlhttp.overrideMimeType("text/xml");
	} else if (window.ActiveXObject) {
		try {
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch(e) {
			try {
				xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch(e) {
				xmlhttp = false;
			}
		}
	}
	return xmlhttp;
}