(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", this), curr = $("li.current", this)[0] || $($li[0]).addClass("current")[0];
			a = $(curr).children();
			
        $li.not(".back, .sep").hover(function(){
			color = ($(this).attr('class') == "current") ? "#4A4A24" : "#ffffff";
            move(this, color);
        }, noop);

        $(this).hover(noop, function(){
            move(curr, "#4A4A24");
        });

        $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;
			$(a).css("color", "#4A4A24");
        };

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

    });
};
})(jQuery);