$( document ).ready(function() {
   $("#panel > header > div.bar > div.nav-main > div.inner").append('<div id="zSortButton" data-role="button">$_Sort</div>');
   $("#zSortButton").on("click", function(){
      var parentArray = new Array();
      var sortedHTML = "";//<p>intro</p>";
      $('.post-list .post').each(function( index ) {
         var childArray = new Array([index],[$(this).wrap('<p/>').parent().html()],[$(this).find("a.comments").text().replace(' comments','').replace(' comment','')]);
         parentArray.push(childArray);
      });
      parentArray.sort(function(a, b) {
          return b[2] - a[2];
      });
      for (i = 0; i < parentArray.length; i++){
         sortedHTML = sortedHTML + parentArray[i][1];
      }
      $('.post-list').html(sortedHTML);
   });
});