$(document).ready(function(){
        $("a.hover img").hover(
          function () {
            $(this).attr("src", $(this).attr("src").split(".").join("-hover.")); 
          }, 
          function () {
            $(this).stop(true,false); // prevents the creation of stacked actions
            $(this).attr("src", $(this).attr("src").split("-hover.").join("."));  // removes -hover from the name of the image
          }
        );
        $("li.fade").hover(function(){$(this).fadeOut(100);$(this).fadeIn(500);});
      });