Prevent multiple submit of your form

Multiple submissions of the same form is definitely one of the most common problem seen when working with web forms. Here’s a super useful piece of code to prevent multiple submissions of the same form.

$(document).ready(function() {
  $('form').submit(function() {
    if(typeof jQuery.data(this, "disabledOnSubmit") == 'undefined') {
      jQuery.data(this, "disabledOnSubmit", { submited: true });
      $('input[type=submit], input[type=button]', this).each(function() {
        $(this).attr("disabled", "disabled");
      });
      return true;
    }
    else
    {
      return false;
    }
  });
});

Source: http://damienalexandre.fr/post/2009/08/02/jQuery-eviter-la-soumission-multiple-d-un-formulaire