$(window).load(function(){
	/**
	* jQuery.ScrollTo - Easy element scrolling using jQuery.
	* Copyright (c) 2007-2009 Ariel Flesler - aflesler(at)gmail(dot)com | http://flesler.blogspot.com
	* Dual licensed under MIT and GPL.
	* Date: 5/25/2009
	* @author Ariel Flesler
	* @version 1.4.2
	*
	* http://flesler.blogspot.com/2007/10/jqueryscrollto.html
	*/
	;(function(d){var k=d.scrollTo=function(a,i,e){d(window).scrollTo(a,i,e)};k.defaults={axis:'xy',duration:parseFloat(d.fn.jquery)>=1.3?0:1};k.window=function(a){return d(window)._scrollable()};d.fn._scrollable=function(){return this.map(function(){var a=this,i=!a.nodeName||d.inArray(a.nodeName.toLowerCase(),['iframe','#document','html','body'])!=-1;if(!i)return a;var e=(a.contentWindow||a).document||a.ownerDocument||a;return d.browser.safari||e.compatMode=='BackCompat'?e.body:e.documentElement})};d.fn.scrollTo=function(n,j,b){if(typeof j=='object'){b=j;j=0}if(typeof b=='function')b={onAfter:b};if(n=='max')n=9e9;b=d.extend({},k.defaults,b);j=j||b.speed||b.duration;b.queue=b.queue&&b.axis.length>1;if(b.queue)j/=2;b.offset=p(b.offset);b.over=p(b.over);return this._scrollable().each(function(){var q=this,r=d(q),f=n,s,g={},u=r.is('html,body');switch(typeof f){case'number':case'string':if(/^([+-]=)?\d+(\.\d+)?(px|%)?$/.test(f)){f=p(f);break}f=d(f,this);case'object':if(f.is||f.style)s=(f=d(f)).offset()}d.each(b.axis.split(''),function(a,i){var e=i=='x'?'Left':'Top',h=e.toLowerCase(),c='scroll'+e,l=q[c],m=k.max(q,i);if(s){g[c]=s[h]+(u?0:l-r.offset()[h]);if(b.margin){g[c]-=parseInt(f.css('margin'+e))||0;g[c]-=parseInt(f.css('border'+e+'Width'))||0}g[c]+=b.offset[h]||0;if(b.over[h])g[c]+=f[i=='x'?'width':'height']()*b.over[h]}else{var o=f[h];g[c]=o.slice&&o.slice(-1)=='%'?parseFloat(o)/100*m:o}if(/^\d+$/.test(g[c]))g[c]=g[c]<=0?0:Math.min(g[c],m);if(!a&&b.queue){if(l!=g[c])t(b.onAfterFirst);delete g[c]}});t(b.onAfter);function t(a){r.animate(g,j,b.easing,a&&function(){a.call(this,n,b)})}}).end()};k.max=function(a,i){var e=i=='x'?'Width':'Height',h='scroll'+e;if(!d(a).is('html,body'))return a[h]-d(a)[e.toLowerCase()]();var c='client'+e,l=a.ownerDocument.documentElement,m=a.ownerDocument.body;return Math.max(l[h],m[h])-Math.min(l[c],m[c])};function p(a){return typeof a=='object'?a:{top:a,left:a}}})(jQuery);
	
	var nav = $('.nav');
	$('#nav-case').click(function(event) {
		$.scrollTo('#case',{duration:1200});
		nav.delay(1000).fadeIn(500);
	});
	$('#nav-clientes').click(function() {
		$.scrollTo('#clientes',{duration:1200});
		nav.delay(1000).fadeIn(500);
	});
	$('#nav-sobre').click(function() {
		$.scrollTo('#sobre',{duration:1200});
		nav.delay(1000).fadeIn(500);
	});
	$('#nav-contato').click(function() {
		$.scrollTo('#sobre',{duration:1200});
		nav.delay(1000).fadeIn(500);
	});
	
	//Greyscale JS
	$(".lista_clientes img").fadeIn(500);
	
	// clone image
	$('.lista_clientes img').each(function(){
		var el = $(this);
		el.css({"position":"absolute"}).wrap("<div class='img_wrapper' style='display: inline-block'>").clone().addClass('img_grayscale').css({"position":"absolute","z-index":"998","opacity":"0"}).insertBefore(el).queue(function(){
			var el = $(this);
			el.parent().css({"width":this.width,"height":this.height});
			el.dequeue();
		});
		this.src = grayscale(this.src);
	});
	
	// Fade image 
	$('.lista_clientes img').mouseover(function(){
		$(this).parent().find('img:first').stop().animate({opacity:1}, 1000);
	})
	$('.img_grayscale').mouseout(function(){
		$(this).stop().animate({opacity:0}, 1000);
	});		
});
	
	// Grayscale w canvas method
	function grayscale(src){
		var canvas = document.createElement('canvas');
		var ctx = canvas.getContext('2d');
		var imgObj = new Image();
		imgObj.src = src;
		canvas.width = imgObj.width;
		canvas.height = imgObj.height; 
		ctx.drawImage(imgObj, 0, 0); 
		var imgPixels = ctx.getImageData(0, 0, canvas.width, canvas.height);
		for(var y = 0; y < imgPixels.height; y++){
			for(var x = 0; x < imgPixels.width; x++){
				var i = (y * 4) * imgPixels.width + x * 4;
				var avg = (imgPixels.data[i] + imgPixels.data[i + 1] + imgPixels.data[i + 2]) / 3;
				imgPixels.data[i] = avg; 
				imgPixels.data[i + 1] = avg; 
				imgPixels.data[i + 2] = avg;
			}
		}
		ctx.putImageData(imgPixels, 0, 0, 0, 0, imgPixels.width, imgPixels.height);
		return canvas.toDataURL();
    
	}
	
	//Scroll Top
	jQuery.fn.topLink=function(a){a=jQuery.extend({min:1,fadeSpeed:200,ieOffset:50},a);return this.each(function(){var b=$(this);b.css("display","none");$(window).scroll(function(){if(!jQuery.support.hrefNormalized){b.css({position:"absolute",top:$(window).scrollTop()+$(window).height()-a.ieOffset})}if($(window).scrollTop()>=a.min){b.fadeIn(a.fadeSpeed)}else{b.fadeOut(a.fadeSpeed)}})})}
	$(document).ready(function() {
	 
	//set the link
	  $('#top-link').topLink({
		min: 300,
		fadeSpeed: 500
	  });
	  //smoothscroll
	  $('#top-link').click(function(e) {
		e.preventDefault();
		$.scrollTo(0,1200);
	  });
	});