var expanding_navigation = new function(){
  var animationSpeed = 150;
  var expand = function(){
    $(this)
      .unbind('mouseenter')
      .mouseleave(contract)
      .stop()
      .attr('src', $(".over", $(this).parent().parent()).attr('src'))
      .css({ 'width': '77px', 'height': '79px','margin': 0})
      .animate(
        { 'width': '103px', 'height': '106px', 'margin': '-14px','z-index':-1 },
        animationSpeed
      );
  };
  var contract = function(){
    $(this)
      .unbind('mouseleave')
      .mouseenter(expand)
      .stop()
      .animate(
        { 'width': '77px', 'height': '79px', 'margin': 0 },
        animationSpeed,
        function(){
          $(this).attr('src', $(this).data('tag'));
        }
      );
  };
  var bindings = function(){
    $(".navigation div img.standard").each(function(){
      $(this)
        .data('tag', $(this).attr('src'))
        .mouseenter(expand);
    });
  };
  return {
    init:function(){
      bindings();
    }
  };
}
$(document).ready(expanding_navigation.init);