$(document).ready(function() {
	$('.prod_thumb img').each(function() {
		var ext = $(this).attr('src').match(/_square.(\w+)/);
		var link = $(this).attr('src').replace(/_square.\w+/,"").replace(/thumbnails\//,"");
		var no = $(this).attr('src').match(/_(\d)_square/);
		var file = $('.product_image').attr('src') + '&iid=' + (no ? no[1] : 1);
		
		$(this).click(function() {
			$('.prod_thumb img').parent('div').removeClass('selected');
			$(this).parent('div').addClass('selected');
			
			$('.product_image').attr('src', file);
			$('.preview_link').attr('href', link + '.' + ext[1]);
			
			return false;
		});
	});

});