/*
 * jQuery Easing v1.1 - http://gsgd.co.uk/sandbox/jquery.easing.php
 *
 * Uses the built in easing capabilities added in jQuery 1.1
 * to offer multiple easing options
 *
 * Copyright (c) 2007 George Smith
 * Licensed under the MIT License:
 *   http://www.opensource.org/licenses/mit-license.php
 */



jQuery.easing={easein:function(x,t,b,c,d){return c*(t/=d)*t+b},easeinout:function(x,t,b,c,d){if(t<d/2)return 2*c*t*t/(d*d)+b;var a=t-d/2;return-2*c*a*a/(d*d)+2*c*a/d+c/2+b},easeout:function(x,t,b,c,d){return-c*t*t/(d*d)+2*c*t/d+b},expoin:function(x,t,b,c,d){var a=1;if(c<0){a*=-1;c*=-1}return a*(Math.exp(Math.log(c)/d*t))+b},expoout:function(x,t,b,c,d){var a=1;if(c<0){a*=-1;c*=-1}return a*(-Math.exp(-Math.log(c)/d*(t-d))+c+1)+b},expoinout:function(x,t,b,c,d){var a=1;if(c<0){a*=-1;c*=-1}if(t<d/2)return a*(Math.exp(Math.log(c/2)/(d/2)*t))+b;return a*(-Math.exp(-2*Math.log(c/2)/d*(t-d))+c+1)+b},bouncein:function(x,t,b,c,d){return c-jQuery.easing['bounceout'](x,d-t,0,c,d)+b},bounceout:function(x,t,b,c,d){if((t/=d)<(1/2.75)){return c*(7.5625*t*t)+b}else if(t<(2/2.75)){return c*(7.5625*(t-=(1.5/2.75))*t+.75)+b}else if(t<(2.5/2.75)){return c*(7.5625*(t-=(2.25/2.75))*t+.9375)+b}else{return c*(7.5625*(t-=(2.625/2.75))*t+.984375)+b}},bounceinout:function(x,t,b,c,d){if(t<d/2)return jQuery.easing['bouncein'](x,t*2,0,c,d)*.5+b;return jQuery.easing['bounceout'](x,t*2-d,0,c,d)*.5+c*.5+b},elasin:function(x,t,b,c,d){var s=1.70158;var p=0;var a=c;if(t==0)return b;if((t/=d)==1)return b+c;if(!p)p=d*.3;if(a<Math.abs(c)){a=c;var s=p/4}else var s=p/(2*Math.PI)*Math.asin(c/a);return-(a*Math.pow(2,10*(t-=1))*Math.sin((t*d-s)*(2*Math.PI)/p))+b},elasout:function(x,t,b,c,d){var s=1.70158;var p=0;var a=c;if(t==0)return b;if((t/=d)==1)return b+c;if(!p)p=d*.3;if(a<Math.abs(c)){a=c;var s=p/4}else var s=p/(2*Math.PI)*Math.asin(c/a);return a*Math.pow(2,-10*t)*Math.sin((t*d-s)*(2*Math.PI)/p)+c+b},elasinout:function(x,t,b,c,d){var s=1.70158;var p=0;var a=c;if(t==0)return b;if((t/=d/2)==2)return b+c;if(!p)p=d*(.3*1.5);if(a<Math.abs(c)){a=c;var s=p/4}else var s=p/(2*Math.PI)*Math.asin(c/a);if(t<1)return-.5*(a*Math.pow(2,10*(t-=1))*Math.sin((t*d-s)*(2*Math.PI)/p))+b;return a*Math.pow(2,-10*(t-=1))*Math.sin((t*d-s)*(2*Math.PI)/p)*.5+c+b},backin:function(x,t,b,c,d){var s=1.70158;return c*(t/=d)*t*((s+1)*t-s)+b},backout:function(x,t,b,c,d){var s=1.70158;return c*((t=t/d-1)*t*((s+1)*t+s)+1)+b},backinout:function(x,t,b,c,d){var s=1.70158;if((t/=d/2)<1)return c/2*(t*t*(((s*=(1.525))+1)*t-s))+b;return c/2*((t-=2)*t*(((s*=(1.525))+1)*t+s)+2)+b},linear:function(x,t,b,c,d){return c*t/d+b}};

(function(jQuery){


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

		return this.each(function(){
			var 
				b = jQuery(this),
				noop = function(){},
				$back = jQuery('<li class="back"><div class="left"></div></li>').appendTo(b),
				$li = jQuery("li",this),
				curr=jQuery("li.current_page_item",this)[0];
				
				
					$li
						.not(".back").
						hover(function(){
							move(this)
						},noop);

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

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

					setCurr(curr);

					function setCurr(a){
						if (!a) {
							$back.css({opacity : 0});
						} else {
							$back.css({left : a.offsetLeft,width : a.offsetWidth });
							curr=a;
						}
					}
					function move(a){ 
						
						if (a) {
							var animate = {
								width : a.offsetWidth,
								left : a.offsetLeft,
								opacity : 1
							}
						} else {
							var animate = {
								width : $li[0].offsetWidth,
								left : $li[0].offsetLeft,
								opacity : 0
							}
						}
						
						$back
							.each(function(){
								jQuery(this).dequeue()
							})
							.animate(animate,o.speed,o.fx);
					}
		});
	};
	
})(jQuery);



jQuery(document).ready(function() {
    jQuery("ul#top_navi").lavaLamp({
        fx: "backout",
        speed: 500
    });
});