function get_xmlhttp() {
	var xmlhttp=false;

	/*@cc_on @*/
	/*@if (@_jscript_version >= 5)
	try {
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
	} catch (e) {
		try {
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (E) {
			xmlhttp = false;
		}
	}
	@end @*/
	if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
		xmlhttp = new XMLHttpRequest();
	}
	
	return xmlhttp;
}

function send_req(xmlhttp, url) {
	xmlhttp.open("GET", url, true);
	if(navigator.userAgent.indexOf('ie') == -1)
		xmlhttp.send( null );
	else
		xmlhttp.send();
}