var req;

function loadxml(method, url, sendParams, func) {
	req = false;
	if(window.XMLHttpRequest) {
		try {
			req = new XMLHttpRequest();
		} catch(e) {
			req = false;
		}
	} else if(window.ActiveXObject) {
		try {
		req = new ActiveXObject("Msxml2.XMLHTTP");
		} catch(e) {
			try {
				req = new ActiveXObject("Microsoft.XMLHTTP");
			} catch(e) {
				req = false;
			}
		}
	}
	if(req) {
		req.onreadystatechange = eval(func);
		req.open(method, url, true);
		if(method=="POST")
			req.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); 
		req.send(sendParams);
	}
}

function isdefined(variable) {
	return (typeof(eval(window)[variable]) != 'undefined');
}