Modernizr - Add HTML5 placeholder support

/**
    * Add Placeholder Support
    *
    * This adds backwards compatibility for HTML5 placeholder attributes
    * @since    0.0.1
    */
    function addPlHolderSupport() {
        var plhName = 'placeholder';
        var inpt;
        if(Modernizr && !Modernizr.input.placeholder)
        {
            $('['+plhName+']').bind({
                focus   : function(){
                    inpt = $(this);
                    if(inpt.val() == inpt.attr(plhName)) {
                        inpt.val('');
                        inpt.removeClass(plhName);
                    }
                },
                blur    : function(){
                    inpt = $(this);
                    if(inpt.val() == '' || inpt.val() == inpt.attr(plhName))
                    {
                        inpt.addClass(plhName);
                        inpt.val(inpt.attr(plhName));
                    }
                }
            }).blur();
            $('['+plhName+']').parents('form').bind('submit', function(){
                $(this).find('['+plhName+']').each(function(){
                    inpt = $(this);
                    if(inpt.val() == inpt.attr(plhName)){
                        inpt.val('');
                    }
                });
            });
        }
    };