placeholder_shim.js

<script>
(function($){
    //Adding inputFocus to namespace for the placeholder shim
    $.fn.inputFocus = function(text){
        $(this).focusin(function(){
            if($(this).val() == text){
                $(this).val('')
            }
        })  
        $(this).focusout(function(){
            if(!$(this).val().length){
                $(this).val(text)
            }
        })
    }

    //Placeholder shim
      elementSupportsAttribute = function(element,attribute){
      //Detects Attribute support for outdated browsers
          var test = document.createElement(element);
          if (attribute in test){
              return true;
          }else{
              return false;
          }
      }
      if(!elementSupportsAttribute('input','placeholder')){
      //Support for outdated browsers
          $('input').not(':submit').each(function(i,val){
                  if($(this).val()=="" && $(this).attr("placeholder")!=""){
                  var $placeholder = $(this).attr('placeholder');
                  $(this).val($placeholder)
                  $(this).inputFocus($placeholder)
                  }
          })

          var $textarea_placeholder = $('textarea').attr('placeholder');
          $('textarea').val($textarea_placeholder)
          $('textarea').inputFocus($textarea_placeholder)

      }
})(jQuery);
</script>