function getXMLHTTP()
{
	var xmlHttp;
	try {
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	}
	catch (e) {
		// Internet Explorer
		try {
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
		catch (e) {
			try {
				xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
			}
			catch (e) {
				alert("Your browser does not support AJAX!");
				return false;
			}
		}
	}
	return xmlHttp;
}

function reCaptchar(ajax_url)
{
	document.getElementById("processing").style["display"] = "";
	var xmlHttp = getXMLHTTP();

	xmlHttp.open("GET", ajax_url, true);
	xmlHttp.send(null);

	xmlHttp.onreadystatechange=function() {
		if(xmlHttp.readyState == 4) {
			document.getElementById("captcha").innerHTML = xmlHttp.responseText;
			document.getElementById("processing").style["display"] = "none";
		}
	}
}