function getxmlhttp(){
	var xmlhttp = false;
	try {
		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
	} catch (e) {
		try {
			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
		} catch (E) {
			xmlhttp = false;
		}
	}
	if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
		xmlhttp = new XMLHttpRequest();
	}
	return xmlhttp;
}

function makerequest(serverPage, objID, str){
	var xmlhttp = getxmlhttp();
	var obj = document.getElementById(objID);
	xmlhttp.open("POST",serverPage, true);
	xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
	xmlhttp.onreadystatechange = function() {
		if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
			obj.innerHTML = xmlhttp.responseText;
		}
/*		Loading . . .
		if(xmlhttp.readyState == 1){
			obj.innerHTML = '<img src="img/comum/loading.gif">';
		}
*/
	}
	xmlhttp.send(str);
}

function makerequestGet(serverPage, objID, parameter){
	var xmlhttp = getxmlhttp();
	var page = serverPage+"?codigo="+parameter;
	var obj = document.getElementById(objID);
	xmlhttp.open("GET",page);
	xmlhttp.onreadystatechange = function() {
		if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
			obj.innerHTML = xmlhttp.responseText;
		}
		//loading
		if(xmlhttp.readyState == 1){
			//obj.innerHTML = '<img src="img/comum/loading.gif">';
			obj.innerHTML = '<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,0,0" width="67" height="40" id="loading-brtel" ><param name="movie" value="img/comum/loading-brtel.swf" /><param name="quality" value="high" /><param name="wmode" value="transparent" /><embed src="img/comum/loading-brtel.swf" quality="high" wmode="transparent"  width="67" height="40" name="loading-brtel"  type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" /></object>';
		}
	}
	xmlhttp.send(null);
}

function escolheCategoria(id){
  makerequestGet("controle/listacategoria.php","selectcategoria",id);
}