function ajax(url, id) {
	var req = false;
	try {
		req = new XMLHttpRequest();
	} catch(e) {
		try {
			req = new ActiveXObject("Msxml2.XMLHTTP");
		} catch(e) {
			try {
				req = new ActiveXObject("Microsoft.XMLHTTP");
			} catch(e) {
				req = false;
			}
		}
	}
	if (req) {
		req.onreadystatechange = function() {
			if (req.readyState == 4) {
				if (req.status == 200) {
					document.getElementById(id).innerHTML = req.responseText;
				} else {
					//alert("Error in AJAX!");
				}
			}
		}
		req.open("GET", url, true);
		req.send(null);
	}
}

function ajax_add(url, data, id) {
	var req = false;
	try {
		req = new XMLHttpRequest();
	} catch(e) {
		try {
			req = new ActiveXObject("Msxml2.XMLHTTP");
		} catch(e) {
			try {
				req = new ActiveXObject("Microsoft.XMLHTTP");
			} catch(e) {
				req = false;
			}
		}
	}
	if (req) {
		req.onreadystatechange = function() {
			if (req.readyState == 4) {
				if (req.status == 200) {
					document.getElementById(id).innerHTML = req.responseText + document.getElementById(id).innerHTML;
				} else {
					//alert("Error in AJAX!");
				}
			}
		}
		req.open("POST", url, true);
		req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		req.send(data);
	}
}

function urlencode (text) {

	text = escape(text.toString()).replace(/\+/g, "%2B");

	// this escapes 128 - 255, as JS uses the unicode code points for them.
	// This causes problems with submitting text via AJAX with the UTF-8 charset.
	var matches = text.match(/(%([0-9A-F]{2}))/gi);
	if (matches)
	{
		for (var matchid = 0; matchid < matches.length; matchid++)
		{
			var code = matches[matchid].substring(1,3);
			if (parseInt(code, 16) >= 128)
			{
				text = text.replace(matches[matchid], '%u00' + code);
			}
		}
	}
	
	text = text.replace('%25', '%u0025');

	return text;
}