$(function()
{
	var maxQuantity = 20;
	
	var amountInput = $(':hidden[name=amount]');
	var baseValue = 20;
	var casingValue = 25;
	
	var casingCheckBox = $(':input#os1');
	var quantityTextBox = $(':input[name=quantity]');
	var priceElement = $('#price-display');
	
	checkForm();
	casingCheckBox.change(checkForm);
	quantityTextBox.change(checkForm);
	
	function checkForm()
	{
		// Validate quantity.
		var quantity = quantityTextBox.val();
		if (!quantity.match(/^\d+$/) || quantity < 1 || quantity > maxQuantity)
		{
			return;
		}
		
		if (casingCheckBox[0].checked)
		{
			amountInput.attr('value', '25.00');
			priceElement.text(casingValue * quantity);
		}
		else
		{
			amountInput.attr('value', '20.00');
			priceElement.text(baseValue * quantity);
		}
		
		// Intercept return keystrokes.
		quantityTextBox.keypress(function(e)
		{
			if (e.which == 13)
			{
				quantityTextBox.change();
				return false;
			}
		});
	}
	
	//$('h1').css({ opacity: 0 });
	//$('h1').animate({ opacity: 1 }, 2000);
	
	$('h3').append('<a href="#container" class="backToTop">Back to Top</a>');
	
	$.localScroll();
	
	$('ul.galleryThumbs').galleria({
		history   : false, // activates the history object for bookmarking, back-button etc.
		clickNext : true, // helper for making the image clickable
		insert    : '#mainGalleryImage', // the containing selector for our main image
		onImage   : function(image,caption,thumb) { // let's add some image effects for demonstration purposes
			
			// fade in the image & caption
			if(! ($.browser.mozilla && navigator.appVersion.indexOf("Win")!=-1) ) { // FF/Win fades large images terribly slow
				image.css('display','none').fadeIn(1000);
			}
			caption.css('display','none').fadeIn(1000);
			
			// fetch the thumbnail container
			var _li = thumb.parents('li');
			
			// fade out inactive thumbnail
			_li.siblings().children('img.selected').fadeTo(500,0.3);
			
			// fade in active thumbnail
			thumb.fadeTo('fast',1).addClass('selected');
			
			// add a title for the clickable image
			image.attr('title','Next image >>');
		},
		onThumb : function(thumb) { // thumbnail effects goes here
			
			// fetch the thumbnail container
			var _li = thumb.parents('li');
			
			// if thumbnail is active, fade all the way.
			var _fadeTo = _li.is('.active') ? '1' : '0.3';
			
			// fade in the thumbnail when finnished loading
			thumb.css({display:'none',opacity:_fadeTo}).fadeIn(1500);
			
			// hover effects
			thumb.hover(
				function() { thumb.fadeTo('fast',1); },
				function() { _li.not('.active').children('img').fadeTo('fast',0.3); } // don't fade out if the parent is active
			)
		}
	});
});