var navigation = {
    imagezoom: function() {
        if (document.getElementById('illustration') && $('#illustration a.lb').lightBox) {
            $('#illustration a.lb').lightBox();
        }
    }
}

$(document).ready(function(){
$("#top .tabs a img").hover(
      function () {
          if (this.src.match(/-over/))
              this.active = true;
          else
              this.src=this.src.replace(/-on/,'-over');
      },
      function () {
          if (!this.active)
              this.src=this.src.replace(/-over/,'-on');
      }
    );
});