var xmlHttp = false;

// Get the HTTP Object
function GetXmlHttpObject() {	
	if (window.ActiveXObject) {
		return new ActiveXObject("Microsoft.XMLHTTP");
	}
	else if (window.XMLHttpRequest) {
		return new XMLHttpRequest();
	}
} 

function getCAEDesc(dataSource, divID, codigo) {
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp)
	{
		var divObj = document.getElementById(divID);
		url=dataSource+"?codigo="+codigo;
		xmlHttp.open("GET",url);
		alert(url);
		xmlHttp.onreadystatechange= function ()
		{
			if (xmlHttp.readyState==4 && xmlHttp.status == 200) {
				divObj.value = xmlHttp.responseText;
			}
		}
		xmlHttp.send(null);
	}
}