$(document).ready(function() {


	
	var totalPanels			= $(".scrollContainer").children().size();
		
	var regWidth			= $(".panel").css("width");
	var regImgWidth			= $(".panel img").css("width");

	
	var movingDistance	    = 111; //2x5 + 101
	
	var curWidth			  = 170;
	var curImgWidth			= 170;


	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', "-220px");

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

	function returnToNormalLeft(element) {
		$(element)
		  .css('left', '-25px')	
      .css('top', '12px')
			.animate({ width: regWidth })
			.find("img")
			.animate({ width: regImgWidth })
			$(element).removeClass('active')
      $(element).css("z-index", "1").animate("slow")
      .end()
	};
	
	function returnToNormalRight(element) {
		$(element)
			.animate({ width: regWidth })
			.find("img")
			.animate({ width: regImgWidth })
			$(element).removeClass('active')
      $(element).css("z-index", "1").animate("slow")
      .css('left', '25px').animate("slow")		
      .css('top', '12px').animate("slow")
      .end()
	};	
	
	function growBigger(element) {
		$(element)
			.animate({ width: curWidth })
			.find("img")
			.animate({ width: curImgWidth })
      .end()
  		$(element).addClass('active');
  		$(element).css("z-index", "1000").animate("slow")
      $(element).css('left', '0px').animate("slow")
      $(element).css('top', '0px').animate("slow")	  		
	}
	
	function init()	{
    $("#panel_"+(curPanel-1)).css('left', '12px');
    $("#panel_"+(curPanel+1)).css('left', '-12px');
    $("#panel_"+(curPanel-2)).css('left', '12px');
    $("#panel_"+(curPanel+2)).css('left', '-12px');
  }
  

  
  //direction true = right, false = left
	function change(direction) {

		
	   init();
	    //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);
				});
			
			direction ? returnToNormalRight("#panel_"+curPanel) : returnToNormalLeft("#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;
	init();
	
	$("#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;
	  }
	});
	
});