jQuery(function($){ 
 
  var settings = { 
    thumbListId: "thumbs", 
    imgViewerId: "viewer",
  }; 
 
  var thumbLinks = $("#"+settings.thumbListId).find("a"), 
    firstThumbLink = thumbLinks.eq(0); 

  $("#"+settings.thumbListId).before( 
    $(document.createElement("div")) 
      .attr("id",settings.imgViewerId) 
      .append( 
        $(document.createElement("img")).attr({ 
          alt: "", 
          src: firstThumbLink.attr("href") 
        }) 
      ) 
  ); 
 
  var imgViewer = $("#"+settings.imgViewerId), 
    bigPic = imgViewer.children("img"); 
 
  thumbLinks 
    .hover(function(e){ 
      e.preventDefault(); 
      var $this = $(this), 
        target = $this.attr("href"); 
      if (bigPic.attr("src") == target) return; 
      bigPic 
        .attr("src",target); 
    }); 
 
});