placehold.js

  $('input[placeholder]').each(function()
  {
    var input = $(this);
    $(input).val(input.attr('placeholder')).addClass('placeheld');

    $(input).focus(function() {
      if (input.val() == input.attr('placeholder'))
        input.val('').removeClass('placeheld');
    });

    $(input).blur(function() {
      if (input.val() == '' || input.val() == input.attr('placeholder'))
        input.val(input.attr('placeholder')).addClass('placeheld');
    });
  });