function criaXMLRequest(){
	try {
		request = new XMLHttpRequest();
	} catch (trymicrosoft) {
		try {
			request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (othermicrosoft) {
			try {
				request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (failed) {
				request = false;
			}
		}
	}
	if (!request)
		alert("Error initializing XMLHttpRequest!");
	else
      return request;
}

function enviaDados(url, callbackFunction){
	
	linkReq = criaXMLRequest(); //Novo Request
	if(linkReq != undefined){
		linkReq.open("POST", url, true);
		linkReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
		linkReq.onreadystatechange = callbackFunction;
		linkReq.send(null);
	}
}

function getCDATA(node) {
	var ie = (typeof window.ActiveXObject != 'undefined');
	var returnText;

	if(node[0].hasChildNodes) {
		returnText = node[0].childNodes[0].nodeValue;
	}
	return returnText;
}

function addOption(selectId, textOpt, valueOpt) {
	var selectObj = document.getElementById(selectId);
	var optObj = new Option(textOpt, valueOpt);
	
	selectObj.options[selectObj.length] =  optObj;
}

function removeOptions(selectId) {
	var selectObj = document.getElementById(selectId);
	
	for(i = selectObj.length; i > 0; i--) {
		selectObj.remove(i);
	}
}