function ajaxLoad(url,callback,postData,plain) {
	var http_request = false;

	if (window.XMLHttpRequest) { // Mozilla, Safari, ...
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType && plain) {
			http_request.overrideMimeType('text/plain');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!http_request) {
		alert('Giving up :( Cannot create an XMLHTTP instance');
		return false;
	}
	http_request.onreadystatechange =  function() {
		if (http_request.readyState == 4) {
			if (http_request.status == 200) {
				eval(callback(http_request));
			}
			else {
				alert('Request Failed: ' + http_request.status);
			}
		}
	};

	if (postData) { // POST
		http_request.open('POST', url, true);
		http_request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');  
		http_request.setRequestHeader("Content-length", postData.length);
		http_request.send(postData);
	}
	else {
		http_request.open('GET', url, true);
		http_request.send(null);
	}
}