function post_login(){
  $('#welcome').load("/welcome");
  $.blockUI({ 
    message: $('#welcome'),
    css: {
      textAlign: 'left',
      top: '90px',
      left: ($(window).width() - 700) /2 + 'px',
      width: '700px',
      padding: '20px',
      cursor: 'arrow',
      border: '3px solid #ee3a68'
    }
  });
}