/*** Inicia Ajax ******************************************/
function runAjax() {
	// verifica se é IE
	if (window.ActiveXObject) {
		//estancia o objeto Active X
		var ajax = new ActiveXObject("Microsoft.XMLHTTP");
	} else {
		//outros navegadores estancia o XMLHttpRequest
		var ajax = new XMLHttpRequest();
	}
	return ajax;
}

/*** Validacao do formulario ******************************/

function validaSenha() {

  if (document.getElementById("senha").value == '') {
    alert('Digite a Senha.');
    return false;
  }

  // Envia form
  try {
    http = createXMLHTTP();
    http.open("post", "index.php", true);
    http.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    http.setRequestHeader("Cache-Control", "no-store, no-cache, must-revalidate");
    http.setRequestHeader("Cache-Control", "post-check=0, pre-check=0");
    http.setRequestHeader("Pragma", "no-cache");

   /* http.setRequestHeader("charset","UTF8");
    http.setRequestHeader("Encoding","UTF8");*/

    http.onreadystatechange = function() {
      if (http.readyState == 4) {
        document.getElementById('sendIntranet').innerHTML = http.responseText;
      }
    }

    http.send('senha='+ document.getElementById("senha").value +
              '&acao=login&n=intranet');

  } catch (eee) {

    document.getElementById('sendIntranet').innerHTML = "Erro ao enviar." ;

  }

}