jQuery HTML5 placeholder fix.js

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

//See more at: http://www.syntacticsugr.com/23-javascript/sugr_cubes/112-detect-html5-placeholder-attribute-support#sthash.g81NfAk7.dpuf 
placeholderSupport = ("placeholder" in document.createElement("input"));
if(!placeholderSupport){
  //This browser does not support the placeholder attribute
  //use javascript instead
  $('[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('');
      }
    })
  });
}