[jQuery] Unable to manipulate List Items

[dblaszczyk]

For some reason when I dynamically create an unordered list I am
unable to get at it through the DOM right away. Here is my code:

    var buildNavi = function(){
     var naviTemplate ='<li class="prev"><a href="#"
title="Previous">Previous</a></li></li><li class="next"><a href="#"
title="Next">Next</a></li>';
     var naviCont = $("<ul></ul>")
     .css({'position' : 'absolute', 'top' : gHeight-50})
     .append(naviTemplate);
     gCont.append(naviCont);
     $("li.next a").click(function(){
      nextPage();
     });
     $("li.prev a").click(function(){
      prevPage();
     });
    };

    var buildGallery = function(){
     $(gCont).empty();
     var initialNum = randPerPage;
     var galUL = $("<ul></ul>")
     .addClass("gallery")
     .css({'overflow' : 'hidden', 'height' : contHeight, 'width' :
contWidth});
     gCont.css('overflow', 'hidden').append(galUL);
     $.get(settings.srcURL,
      {'Media' : settings.media},
      function (data){
       $(data).find("ThumbSrc").each(function(i){
        var srcVal = $(this).text();
        $('<img>').attr('src', srcVal)
        .css({'margin' : iMargin})
        .load(function(){
           $("<li></li>")
           .addClass("galleryThumb")
           .append($(this))
           .css({'left' : 0, 'top' : 0, 'position' : 'absolute'})
           .appendTo(galUL);
         })
         .hide(0,loadFirstPage(i));
       });
      });

      buildNavi();
     };

     var loadFirstPage = function(itemNum){
      if(itemNum<=startPage){
         var imgWidth = $('ul.gallery li:eq('+itemNum+') img').width
();
         var imgHeight = $('ul.gallery li:eq('+itemNum+') img').height
();
         var setLeft = $.randomBetween(0,(gWidth-imgWidth));
         var setTop = $.randomBetween(0,(gHeight-imgHeight));

         $('ul.gallery li:eq('+itemNum+') img').fadeIn('slow');
         $('ul.gallery li:eq('+itemNum+')').show().animate({left :
setLeft,
         top : setTop, opacity : 'toggle'}, 'slow');
      }
     };

     buildGallery();

Is there someway to make sure that the UL is completely built up with
the images in place before running my loadFirstPage function?