$(function() {	
	var totalPanels			= $(".scrollContainer").children().size();
	var regWidth			= $(".panel").css("width");
	var regImgWidth			= $(".panel img").css("width");
	var regTitleSize		= $(".panel h2").css("font-size");
	var regParSize			= $(".panel p").css("font-size");
	
	var movingDistance	    = 294;
	var curWidth			= 350;
	var curImgWidth			= 326;
	var curTitleSize		= "1.6em";
	var curParSize			= "1.3em";

	var $panels				= $('#slider .scrollContainer > div');
	var $container			= $('#slider .scrollContainer');
	$panels.css({'float' : 'left','position' : 'relative'});
	$("#slider").data("currentlyMoving", false);
	$container
		.css('width', ($panels[0].offsetWidth * $panels.length) + 100 )
		.css('left', "-313px");
	var scroll = $('#slider .scroll').css('overflow', 'hidden');
	function returnToNormal(element) {
		$(element)
			.animate({ width: regWidth })
			.find("img")
			.animate({ width: regImgWidth })
		    .end()
			.find("h2")
			.animate({ fontSize: regTitleSize })
			.end()
			.find("p")
			.animate({ fontSize: regParSize });
	};
	
	function growBigger(element) {
		$(element)
			.animate({ width: curWidth })
			.find("img")
			.animate({ width: curImgWidth })
		    .end()
			.find("h2")
			.animate({ fontSize: curTitleSize })
			.end()
			.find("p")
			.animate({ fontSize: curParSize });
	}
	
	function change(direction) {
		if((direction && !(curPanel < totalPanels)) || (!direction && (curPanel <= 1))) { return false; }	        
        if (($("#slider").data("currentlyMoving") == false)) {            
			$("#slider").data("currentlyMoving", true);			
			var next         = direction ? curPanel + 1 : curPanel - 1;
			var leftValue    = $(".scrollContainer").css("left");
			var movement	 = direction ? parseFloat(leftValue, 10) - movingDistance : parseFloat(leftValue, 10) + movingDistance;		
			$(".scrollContainer")
				.stop()
				.animate({
					"left": movement
				}, function() {
					$("#slider").data("currentlyMoving", false);
				});			
			returnToNormal("#panel_"+curPanel);
			growBigger("#panel_"+next);			
			curPanel = next;			
			$("#panel_"+(curPanel+1)).unbind();				
			$("#panel_"+(curPanel+1)).click(function(){ change(true); });						
			$("#panel_"+(curPanel-1)).unbind();			
			$("#panel_"+(curPanel-1)).click(function(){ change(false); }); 			
			$("#panel_"+curPanel).unbind();
		}
	}	
	growBigger("#panel_3");	
	var curPanel = 3;	
	$("#panel_"+(curPanel+1)).click(function(){ change(true); });
	$("#panel_"+(curPanel-1)).click(function(){ change(false); });	
	$(".right").click(function(){ change(true); });	
	$(".left").click(function(){ change(false); });
	$(window).keydown(function(event){
	  switch (event.keyCode) {
			case 13: //enter
				$(".right").click();
				break;
			case 32: //espaço
				$(".right").click();
				break;
	    case 37: //seta esq
				$(".left").click();
				break;
			case 39: //seta dir
				$(".right").click();
				break;
	  }
	});
});