function moveUp() {
  var $content = $("#content");
  var curr = $content.get(0).scrollTop;
  $("#content").animate({scrollTop: (curr - 120)+"px"}, "slow");
}
function moveDown() {
  var $content = $("#content");
  var curr = $content.get(0).scrollTop;
  $("#content").animate({scrollTop: (curr + 120)+"px"}, "slow");
}
$(document).ready(function() {
  $("a[rel='fancy']").fancybox();

  var content_height = $("#content").height();
  var content_scroll_height = $("#content").get(0).scrollHeight;
  if (content_height < content_scroll_height) {
    $('<div id="arrow-up"></div>').appendTo("#wrapper").bind('click', moveUp );
    $('<div id="arrow-down"></div>').appendTo("#wrapper").bind('click', moveDown );
  }
});