$(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	    = 240;
	
	var curWidth			= 210;
	var curImgWidth			= 120;
	var curTitleSize		= \"15px\";
	var curParSize			= \"15px\";

	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) + 120 )
		.css('left', \"-230px\");

	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 });
	}
	
	//direction true = right, false = left
	function change(direction) {
	   
	    //if not at the first or last panel
		if((direction && !(curPanel < totalPanels)) || (!direction && (curPanel <= 1))) { return false; }	
        
        //if not currently moving
        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, 100) - movingDistance : parseFloat(leftValue, 100) + movingDistance;
		
			$(\".scrollContainer\")
				.stop()
				.animate({
					\"left\": movement
				}, function() {
					$(\"#slider\").data(\"currentlyMoving\", false);
				});
			
			returnToNormal(\"#panel_\"+curPanel);
			growBigger(\"#panel_\"+next);
			
			curPanel = next;
			
			//remove all previous bound functions
			$(\"#panel_\"+(curPanel+1)).unbind();	
			
			//go forward
			$(\"#panel_\"+(curPanel+1)).click(function(){ change(true); });
			
            //remove all previous bound functions															
			$(\"#panel_\"+(curPanel-1)).unbind();
			
			//go back
			$(\"#panel_\"+(curPanel-1)).click(function(){ change(false); }); 
			
			//remove all previous bound functions
			$(\"#panel_\"+curPanel).unbind();
		}
	}
	
	// Set up \"Current\" panel and next and prev
	growBigger(\"#panel_3\");	
	var curPanel = 3;
	
	$(\"#panel_\"+(curPanel+1)).click(function(){ change(true); });
	$(\"#panel_\"+(curPanel-1)).click(function(){ change(true); });
	
	//when the left/right arrows are clicked
	$(\".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: //space
				$(\".right\").click();
				break;
	    case 37: //left arrow
				$(\".left\").click();
				break;
			case 39: //right arrow
				$(\".right\").click();
				break;
	  }
	});
	
});