jQuery HTML5 placeholder fix.js

// Released under MIT license: http://www.opensource.org/licenses/mit-license.php

$('[placeholder]').focus(function() {
  var input = $(this);
  if (input.val() == input.attr('placeholder')) {
    input.val('');
    input.removeClass('placeholder');
  }
}).blur(function() {
  var input = $(this);
  if (input.val() == '' || input.val() == input.attr('placeholder')) {
    input.addClass('placeholder');
    input.val(input.attr('placeholder'));
  }
}).blur().parents('form').submit(function() {
  $(this).find('[placeholder]').each(function() {
    var input = $(this);
    if (input.val() == input.attr('placeholder')) {
      input.val('');
    }
  })
});

Just as an aside, this would NEVER have worked as expected, because the original code never loads the contents of the placeholder on page load.

I'll fork this with correct code, and link to that, rather than adding more confusion to this page.

Again, I would recommend against using the top code as is because it's incomplete and technically wrong, but the core logic is fine, just incomplete and inadequate to most standard use cases. It looks like it wasn't actually tested on the browsers it was targeted at since the issues would have been obvious immediately.

This is imperfect way. please refer https://github.com/mathiasbynens/jquery-placeholder.