$(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	    = 224;
	var curWidth			= 244;
	var curImgWidth			= 228;
	var curTitleSize		= "15px";
	var curParSize			= "11px";

	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', "0px");
		
	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, 10) - movingDistance : parseFloat(leftValue, 10) + 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_2");	

	var curPanel = 2;

	

	$("#panel_"+(curPanel+1)).click(function(){ change(true); });

	$("#panel_"+(curPanel-1)).click(function(){ change(false); });

	

	//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;

	  }

	});

	

});