$(document).ready(function() {
	$('.cracktop ul').fadeOut(0);
	$('.scroll-to').click(function(){
		var href = $(this).attr('href');
		if(href == '#main'){
			var _top = 0;
		} else {
			var _top = $(href).length ? $(href).offset().top : 0;
		}
		$('body, html').animate({scrollTop: _top},{duration: 300})
		return false;
	});
	$(window).scroll(function(){
		if ($(window).width()>1024){
			changeActive();
			if ($(window).scrollTop() > 10) {
				$('.cracktop ul').fadeIn(250);
				$('#logo').stop().animate({ marginLeft: -$('#logo').width() }, { queue: false, easing: 'swing', duration: 500 });
				$('nav .left').stop().animate({ opacity: 1 }, { queue: false, easing: 'swing', duration: 250 });
			} else {
				$('.cracktop ul').fadeOut(250);
				$('#logo').stop().animate({ marginLeft: 0 }, { queue: false, easing: 'swing', duration: 500 });
				$('nav .left').stop().animate({ opacity: 0 }, { queue: false, easing: 'swing', duration: 250 });
			}
		}
	});
});

function changeActive(){
	var hrefArr = [];
	var windowH = $(window).height()/4;
	$("nav ul li a").each(function(){
		if($($(this).attr('href')).length){
			hrefArr.push($($(this).attr('href')).offset().top);
		}
	});
	$(window).bind('scroll', function(){
		refreshActive();
	});
	function refreshActive(){
		if(hrefArr.length){
			scrollTop = $(window).scrollTop();
			var _top = scrollTop;
			var _bottom = $(document).height() - scrollTop;
			for(var i=0; i<hrefArr.length; i++){
				if(_bottom < ($(window).height()+10)){
					$('nav ul li a').removeClass('active').eq(1).addClass('active');
				} else if(_top > hrefArr[i] - windowH && _top < hrefArr[i] + windowH){
					$('nav ul li a').removeClass('active').eq(i).addClass('active');
				}
			};
		}
	}
	refreshActive();
}

/* jQuery Easing v1.3 - http://gsgd.co.uk/sandbox/jquery/easing/ */
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*0.3}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*0.3}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*(0.3*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 -0.5*(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)*0.5+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+0.75)+b}else{if(t<(2.5/2.75)){return c*(7.5625*(t-=(2.25/2.75))*t+0.9375)+b}else{return c*(7.5625*(t-=(2.625/2.75))*t+0.984375)+b}}}},easeInOutBounce:function(x,t,b,c,d){if(t<d/2){return jQuery.easing.easeInBounce(x,t*2,0,c,d)*0.5+b}return jQuery.easing.easeOutBounce(x,t*2-d,0,c,d)*0.5+c*0.5+b}});