window.addEvent('domready', function () {

    $$('div.post-entry a').each(function (el) {

        var text = el.get('text');
        if (text.contains('PDF')) {
            // alert(text);
            // el.setStyle('color', 'red');
            new Element('img', { 'src': '/wp-content/themes/nest/images/pdf.png', 'class': 'icon' }).inject(el);



        }

    });

});