$(document).ready(function() {
  $("#myform").submit(function(event) {
    event.preventDefault();
    // console.log($("#myform").serialize());
    checkpasswd($("#myform").serialize());
    //
  });
});

function checkpasswd(data) {
  // console.log(data);
  $.post('php/checkpasswd.php', data, function(retdata){
    if (retdata.valid == true) {
      //successfully logged in
      sessionStorage.LAST_ACTIVITY = Math.round(new Date().getTime() / 1000);
      document.cookie = "LAST_ACTIVITY="+Math.round(new Date().getTime() / 1000);
      window.location ="movies.php";
      return true;
    }else {
      $(".mypassalert").show();

      setTimeout(function () {
        $(".mypassalert").hide();
      }, 2000);
    }
  },'json');
}