$(function() {
	
	var totalPanels			= $('.scrollContainer').children().size();
		
	var regHeight 			= $(".panel").css("height");
	var regImgHeight 		= $(".panel img").css("height");
	var regWidth 			= $(".panel").css("width");
	var regImgWidth			= $(".panel img").css("width");
	
	var movingDistance	    = 117;
	
	var curHeight			= 269;
	var curImgHeight			= 249;
	var curWidth			= 180;
	var curImgWidth			= 180;

	var $panels				= $('#slider .scrollContainer > div');
	var $container			= $('#slider .scrollContainer');

	$panels.css({'position' : 'relative'});
    
	$("#slider").data("currentlyMoving", false);

	$container
		.css('height', ($panels[0].offsetHeight * $panels.length) + 100 )
		.css('top', "0px");

	var scroll = $('#slider .scroll').css('overflow', 'hidden');

	function returnToNormal(element) {
		$(element)
			.animate({
				height: regHeight,
				width: regWidth
				})
			.find("img")
			.animate({
				height: regImgHeight,
				width: regImgWidth
				})
		    .end()
	};
	
	function growBigger(element) {
		$(element)
			.animate({
				height: curHeight,
				width: curWidth
				})
			.find("img")
			.animate({
				height: curImgHeight,
				width: curImgWidth
				})
		    .end()
	}
	
	//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("top");
			var movement	 = direction ? parseFloat(leftValue, 10) - movingDistance : parseFloat(leftValue, 10) + movingDistance;
		
			$('.scrollContainer')
				.stop()
				.animate({
					"top": 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
	$(".down").click(function(){ change(true); });	
	$(".top").click(function(){ change(false); });
});