(function($) {
$.fn.lavaLamp = function(o) {
    o = $.extend({ fx: "linear", speed: 400, click: function(){} }, o || {});

    return this.each(function() {
        var me = $(this), noop = function(){},
            $back = $('<li class="virtual-line"></li>').appendTo(me),
            $li = $("li", this), curr = $("li.current", this)[0] || $($li[0]).addClass("current")[0];

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

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

        setCurr(curr);

        function setCurr(el) {
            $back.css({ "left": el.offsetLeft+"px", "width": (el.offsetWidth - 6) +"px" });
            curr = el;
        };

        function move(el) {
            $back.each(function() {
                $(this).dequeue(); }
            ).animate({
                width: (el.offsetWidth - 6),
                left: el.offsetLeft
            }, o.speed, o.fx);
        };

    });
};
})(jQuery);