new-script.js

jQuery(function(){
  if (window.matchMedia) {
    if (window.matchMedia("(max-device-width: 480px)").matches) {
      jQuery('.mobile-src').each(function(){
        var $el = jQuery(this),
          newSrc = $el.attr('src').split('?')[0] + "-mobile?fmt=png-alpha&qlt=95";
 
        jQuery('<img>', {
          'src': newSrc,
          'load': function(){
            $el.removeAttr('height width').attr({
              'src': newSrc
            })
          }
        });
      })
    }
  }
});