(function($) {
$.fn.lavaLamp = function(o) {
    o = $.extend({ fx: "linear", speed: 500, click: function(){} }, o || {});

    return this.each(function() {
        var   me = $(this)
            , noop = function(){}
            , $back = $('<li class="back"><div class="left"></div></li>').appendTo(me)
            , $li = $("li:not(.navPic)", this)
            , curr = $("li.current", this)[0] || $($li[0]).addClass("current")[0];
        $back.children('div.left').css({'opacity' : 0})

        $li.not(".back").hover(function() {
            move(this);
        }, noop);

        $(this).hover(noop, function() {
            move(curr, true);
        });

        $li.click(function(e) {
            setCurr(this);
            return o.click.apply(this, [e, this]);
        });

        setCurr(curr);

        function setCurr(el) {
            $back.css({ "left": el.offsetLeft+"px", "width": el.offsetWidth+"px" });
            curr = el;
        };

        function move(el, onCurr) {
            $back.each(function() {
                $.dequeue(this, "fx"); }
            ).animate({
                width: el.offsetWidth,
                left: el.offsetLeft
            }, o.speed, o.fx);
            $back.children('div.left')
                 .animate({
                      opacity: (onCurr)? 0: 1
                  }, 100);
        };

    });
};
})(jQuery);