function openAjax() {
var Ajax;
try {
Ajax = new XMLHttpRequest();
} catch(ee) {
try {
Ajax = new ActiveXObject("Msxml2.XMLHTTP");
} catch(e) {
try {
Ajax = new ActiveXObject("Microsoft.XMLHTTP");
} catch(e) {
Ajax = false;
}
}
}
return Ajax;
}

function carrega(page, id){

ajax = new openAjax();

var div = document.getElementById(id);

ajax.onreadystatechange = function(){
if(ajax.readyState == 1){div.innerHTML="<div align='center'><BR><BR><BR><BR><img src='contents/loading.gif' border='0'><BR><BR><BR><BR><BR><BR><BR><BR><BR><BR></div>";}
if(ajax.readyState == 4){div.innerHTML=ajax.responseText;}

}
ajax.open("GET",page,true);
ajax.send(null);
}

function enviarForm(url, campos, destino) {

ajax2 = new openAjax();
var elemento = document.getElementById(destino);

ajax2.onreadystatechange = function(){
if(ajax2.readyState == 1){elemento.innerHTML="<div align='center'><img src='contents/loading.gif' border='0'></div>";}
if(ajax2.readyState == 4){elemento.innerHTML=ajax2.responseText;}
}
ajax2.open('POST', url+'?'+campos, true);
ajax2.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
ajax2.setRequestHeader("Content-length", campos.length);
ajax2.send(campos);

}