function Login(){
  var user = $('#user').val();
  var password = $('#password').val();
  var parametros = { 'user' : user, 'password': password, };
  $.ajax({
    data:  parametros, url:  'https://facturacionnuevo2.ipicyt.edu.mx/', type:  'POST', dataType: 'json',
    beforeSend: function () {
      $('#loading').css({'display':'block'});
    },
    success:  function (data) {
      $('#loading').css({'display':'none'});
      if( data.success == 'false' ){
        $('#Errores').css({'display':'block'});
        $('#Errores').css({'opacity':'1'});
        $('#Errores').html('<span style="color:red">'+data.msg+'</span>').animate({
          opacity: 0.0,
        }, 2500, function() {
          $('#Errores').css({'display':'none'});
        });
      }else if(data.success == "true"){ 
        window.open('https://facturacionnuevo2.ipicyt.edu.mx/home','_self');
      }
    },
    error: function(jqXHR, textStatus, errorThrown){
      alert( jqXHR.responseText );
    },
    complete: function ( jqXHR, textStatus ){
      $('#loading').css({'display':'block'});
    }
  });
}