jQuery.easing['jswing']=jQuery.easing['swing'];jQuery.extend(jQuery.easing,{def:'easeOutQuad',swing:function(x,t,b,c,d){return jQuery.easing[jQuery.easing.def](x,t,b,c,d)},easeInQuad:function(x,t,b,c,d){return c*(t/=d)*t+b},easeOutQuad:function(x,t,b,c,d){return-c*(t/=d)*(t-2)+b},easeInOutQuad:function(x,t,b,c,d){if((t/=d/2)<1)return c/2*t*t+b;return-c/2*((--t)*(t-2)-1)+b},easeInCubic:function(x,t,b,c,d){return c*(t/=d)*t*t+b},easeOutCubic:function(x,t,b,c,d){return c*((t=t/d-1)*t*t+1)+b},easeInOutCubic:function(x,t,b,c,d){if((t/=d/2)<1)return c/2*t*t*t+b;return c/2*((t-=2)*t*t+2)+b},easeInQuart:function(x,t,b,c,d){return c*(t/=d)*t*t*t+b},easeOutQuart:function(x,t,b,c,d){return-c*((t=t/d-1)*t*t*t-1)+b},easeInOutQuart:function(x,t,b,c,d){if((t/=d/2)<1)return c/2*t*t*t*t+b;return-c/2*((t-=2)*t*t*t-2)+b},easeInQuint:function(x,t,b,c,d){return c*(t/=d)*t*t*t*t+b},easeOutQuint:function(x,t,b,c,d){return c*((t=t/d-1)*t*t*t*t+1)+b},easeInOutQuint:function(x,t,b,c,d){if((t/=d/2)<1)return c/2*t*t*t*t*t+b;return c/2*((t-=2)*t*t*t*t+2)+b},easeInSine:function(x,t,b,c,d){return-c*Math.cos(t/d*(Math.PI/2))+c+b},easeOutSine:function(x,t,b,c,d){return c*Math.sin(t/d*(Math.PI/2))+b},easeInOutSine:function(x,t,b,c,d){return-c/2*(Math.cos(Math.PI*t/d)-1)+b},easeInExpo:function(x,t,b,c,d){return(t==0)?b:c*Math.pow(2,10*(t/d-1))+b},easeOutExpo:function(x,t,b,c,d){return(t==d)?b+c:c*(-Math.pow(2,-10*t/d)+1)+b},easeInOutExpo:function(x,t,b,c,d){if(t==0)return b;if(t==d)return b+c;if((t/=d/2)<1)return c/2*Math.pow(2,10*(t-1))+b;return c/2*(-Math.pow(2,-10*--t)+2)+b},easeInCirc:function(x,t,b,c,d){return-c*(Math.sqrt(1-(t/=d)*t)-1)+b},easeOutCirc:function(x,t,b,c,d){return c*Math.sqrt(1-(t=t/d-1)*t)+b},easeInOutCirc:function(x,t,b,c,d){if((t/=d/2)<1)return-c/2*(Math.sqrt(1-t*t)-1)+b;return c/2*(Math.sqrt(1-(t-=2)*t)+1)+b},easeInElastic: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},easeOutElastic: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},easeInOutElastic: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},easeInBack:function(x,t,b,c,d,s){if(s==undefined)s=1.70158;return c*(t/=d)*t*((s+1)*t-s)+b},easeOutBack:function(x,t,b,c,d,s){if(s==undefined)s=1.70158;return c*((t=t/d-1)*t*((s+1)*t+s)+1)+b},easeInOutBack:function(x,t,b,c,d,s){if(s==undefined)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},easeInBounce:function(x,t,b,c,d){return c-jQuery.easing.easeOutBounce(x,d-t,0,c,d)+b},easeOutBounce: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}},easeInOutBounce:function(x,t,b,c,d){if(t<d/2)return jQuery.easing.easeInBounce(x,t*2,0,c,d)*.5+b;return jQuery.easing.easeOutBounce(x,t*2-d,0,c,d)*.5+c*.5+b}});

jQuery.fn.moveNavigation = function(_options){
    // defaults options	
    var _options = jQuery.extend({
	    duration:500,
	    addBG:'<li class="current"><a href="#">&nbsp;</a></li>',
	    liBgClass :'current',
		delay: 100
    },_options);

    return this.each(function(){
	    var _obg = jQuery(this);
	    var _liWidth = [];
	    var _aWidth = [];
	    var _lis = jQuery(_obg).children('li');
	    var _links = jQuery(_obg).find('a');
	    var _linkIndex = _links.index(_links.filter('.active'));
	    var _timer = false;
	    var _pLeft = parseInt(jQuery(_obg).css('paddingLeft'));
	    var _visible = false;
		var _active = _lis.filter('.active');
	    jQuery(_lis).filter(':last-child').css('background','none');
	    
	    _lis.each(function(i, el){
			_liWidth[i] = jQuery(el).outerWidth();
			_aWidth[i] = jQuery(el).width();
	    });
	    if (jQuery.browser.msie) jQuery(_options.addBG).insertBefore(jQuery(_obg).find('li:first-child'));
	    else jQuery(_obg).append(_options.addBG);
	    		
	    jQuery.fn.moveNavigation.animateThis = function(_activeIndex, _obg){
			var _activeLiWidth = _liWidth[_activeIndex];
			var _activeAWidth = _aWidth[_activeIndex];
			var _left = _pLeft;
			for (var j = _activeIndex-1; j >= 0; j--) {
				_left += _liWidth[j];
			}
			$('li.'+_options.liBgClass, _obg)
				.animate({width:_activeAWidth +'px'},{queue:false,duration:200, easing:'linear'})
				.animate({
					left:_left+'px'
				},{queue:false,duration:_options.duration, easing:'easeOutBack'});
			_left = _pLeft;
	    }
	    jQuery.fn.moveNavigation.showThis = function(_activeIndex, _obg){
			var _activeLiWidth = _liWidth[_activeIndex];
			var _activeAWidth = _aWidth[_activeIndex];
			var _left = _pLeft;
			for (var j = _activeIndex-1; j >= 0; j--) {
				_left += _liWidth[j];
			}
			$('li.'+_options.liBgClass, _obg)
				.css({
					left:(_left+(_activeAWidth/2))+'px',
					width:0,
					opacity:0,
					display: 'block'
				})
				.animate({
					width:_activeAWidth +'px',
					opacity:1,
					left:_left+'px'
				},{queue:false,duration:_options.duration, easing:'easeOutBack'});
			_left = _pLeft;
	    }
	    jQuery.fn.moveNavigation.hideThis = function(_activeIndex, _obg){
			var _activeAWidth = _aWidth[_activeIndex];
			var _left = parseInt($('li.'+_options.liBgClass, _obg).css('left'));
			$('li.'+_options.liBgClass, _obg).fadeOut(200);
	    }
	    
	    if (_lis.filter('.active').length) {
	    	var _lisIndex = _lis.index(_lis.filter('.active'));
			jQuery.fn.moveNavigation.animateThis(_lisIndex, _obg);
	    } else {
			jQuery(_obg).children('li.'+_options.liBgClass).css('display','none');
	    }
	    _links.hover(function(){
			_linkIndex = _links.index(jQuery(this));
			_active.removeClass('active');
			if (_timer) clearTimeout(_timer);
			if (_active.length || _visible) {
				jQuery.fn.moveNavigation.animateThis(_linkIndex, _obg);
			} else {
				jQuery.fn.moveNavigation.showThis(_linkIndex, _obg);
				_visible = true;
			}
	    }, function() {
			var _this = this;
			_timer = setTimeout(function() {
				_active.addClass('active');
				if (_active.length) {
					var _lisIndex = _lis.index(_active);
					jQuery.fn.moveNavigation.animateThis(_lisIndex, _obg);
				} else {
				var _linksIndex = _links.index($(_this));
					jQuery.fn.moveNavigation.hideThis(_linksIndex, _obg);
					_visible = false;
				}
		}, _options.delay);
	    });
	    
    });
}

$(document).ready(function(){
    $('ul.main-nav').moveNavigation();
});