How to support placeholder attribute in IE8 and 9

You can use any one of these polyfills:

• https://github.com/jamesallardice/Placeholders.js (doesn't support password fields)
• https://github.com/chemerisuk/better-placeholder-polyfill

These scripts will add support for the placeholder attribute in browsers that do not support it, and they do not require jQuery!

the $.Browser.msie is not on the latest JQuery anymore... you have to use the $.support

like below:

 <script>

     (function ($) {
         $.support.placeholder = ('placeholder' in document.createElement('input'));
     })(jQuery);


     //fix for IE7 and IE8
     $(function () {
         if (!$.support.placeholder) {
             $("[placeholder]").focus(function () {
                 if ($(this).val() == $(this).attr("placeholder")) $(this).val("");
             }).blur(function () {
                 if ($(this).val() == "") $(this).val($(this).attr("placeholder"));
             }).blur();

             $("[placeholder]").parents("form").submit(function () {
                 $(this).find('[placeholder]').each(function() {
                     if ($(this).val() == $(this).attr("placeholder")) {
                         $(this).val("");
                     }
                 });
             });
         }
     });
 </script>

You could use this jQuery plugin: https://github.com/mathiasbynens/jquery-placeholder

But your link seems to be also a good solution.