function getXMLHttp() {
	var XMLHttp = null;
	if (window.XMLHttpRequest) {
		try {
			XMLHttp = new XMLHttpRequest();
		} catch (e) { }
	} else if (window.ActiveXObject) {
		try {
			XMLHttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				XMLHttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) { }
		}
	}
	return XMLHttp;
}

function Ajax(url, elementid)
{
	var XMLHttp = getXMLHttp();
	var updateElement = document.getElementById(elementid);
	
	XMLHttp.open("GET", url);
	XMLHttp.onreadystatechange = handlerFunction;
	XMLHttp.send(null);
	
	function handlerFunction()
	{
		if(XMLHttp.readyState == 1)
		{
			updateElement.innerHTML = '<img src=\"/imagens/loading.gif\">';
		}
		else if(XMLHttp.readyState == 4)
		{
			updateElement.innerHTML = XMLHttp.responseText;
		}
	}	
}