Quick jQuery plugin to parse data from an element and store it on the element via jQuery.data

$.fn.parseData.js

(function($){
    $.fn.parseData = function(){
        return $(this).filter('[js-data]').each(function(){
            var data = jQuery.parseJSON($(this).attr('js-data')), prop;
            for(prop in data)
                $(this).data(prop, data[prop]);
        }).end();
    }
})(jQuery);