jquery.hint using placeholder

jquery.hint.js

/**
* @author Remy Sharp
* @url http://remysharp.com/2007/01/25/jquery-tutorial-text-box-hints/
*/
/*jshint curly:false */
(function ($) {

  var isInputSupported = 'placeholder' in document.createElement('input'),
      isTextareaSupported = 'placeholder' in document.createElement('textarea');

// bail if this functionality is supported
if (isInputSupported && isTextareaSupported) return;

$.fn.hint = function (blurClass) {
  if (!blurClass) {
    blurClass = 'blur';
  }

  return this.each(function () {
    // get jQuery version of 'this'
    var $input = $(this),

    // capture the rest of the variable to allow for reuse
      title = $input.attr('placeholder'),
      $form = $(this.form),
      $win = $(window);

    function remove() {
      if ($input.val() === title && $input.hasClass(blurClass)) {
        $input.val('').removeClass(blurClass);
      }
    }

    // only apply logic if the element has the attribute
    if (title) {
      // on blur, set value to title attr if text is blank
      $input.blur(function () {
        if (this.value === '') {
          $input.val(title).addClass(blurClass);
        }
      }).focus(remove).blur(); // now change all inputs to title

      // clear the pre-defined text when form is submitted
      $form.submit(remove);
      $win.unload(remove); // handles Firefox's autocomplete
    }
  });
};

})(jQuery);