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

function request(url, handler) {
	if (!this.http)
		this.http = get_http();
	this.working = false;
	if (!this.working && this.http) {
		var http = this.http;
		this.http.open("GET", url, true);
		this.http.onreadystatechange = function() {
			if (http.readyState == 4) {
				if (handler && (handler.length > 0))
				{
					var code = handler+"('"+http.responseText+"');";
					eval(code);
				}
				this.working = false;
			}else{
				//load data
			}
		}
		this.working = true;
		this.http.send(null);
	}
}