var http_request = false;
  function AddLista(url, parameters) {
     http_request = false;
     if (window.XMLHttpRequest) {
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
           http_request.overrideMimeType('text/html');
        }
     } else if (window.ActiveXObject) {
        try {
           http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
           try {
              http_request = new ActiveXObject("Microsoft.XMLHTTP");
           } catch (e) {}
        }
     }
     if (!http_request) {
        alert('Cannot create XMLHTTP instance');
        return false;
     }
     http_request.onreadystatechange = alertContentsAdd;
     http_request.open('POST', url, true);
     http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
     http_request.setRequestHeader("Content-length", parameters.length);
     http_request.setRequestHeader("Connection", "close");
     http_request.send(parameters);
  }
  function alertContentsAdd() {
     if (http_request.readyState == 4) {
        if (http_request.status == 200) {
           result = http_request.responseText;
           if(result=="login"){
               alert("Atenção! Cadastre-se ou faça o login.");
               location.href = "?pG=X19wYWluZWw=";
           } else {
               alert(result);
           }
        } else {
           alert('Erro no sistema.');
        }
     }
  }
function Add(id,tipo){
     var strA = "pid=" +  encodeURI(id) +  "&t=" + encodeURI(tipo);
     AddLista('__ajax/adiciona.php', strA);
}