$(document).ready(function() {
		
			//alternating rows
			$('tr:even').addClass('alternating-1');
			$('tr:odd').addClass('alternating-2');

			$('.folder dt').animate({
				"opacity": .7
			});
			$('.folder dt').hover(function() {
				$(this).stop().animate({opacity: 1});
			}, function() {
				$(this).stop().animate({opacity: 0.7});
			});

			// collapse and expand extra information
            $('.folder').find('dd').hide().end().find('dt').click(function() {
                $(this).next().slideToggle();
            });

/*
			console.log(num);
*/			


	// ***
	// Scrolling background
	// ***

	// height of background image in pixels
	var backgroundheight = 4000;

	// get the current minute/hour of the day
	var now = new Date();
	var hour = now.getHours();
	var minute = now.getMinutes();

	// work out how far through the day we are as a percentage - e.g. 6pm = 75%
	var hourpercent = hour / 24 * 100;
	var minutepercent = minute / 60 / 24 * 100;
	var percentofday = Math.round(hourpercent + minutepercent);

	// calculate which pixel row to start graphic from based on how far through the day we are
 	var offset = backgroundheight / 100 * percentofday;

	// graphic starts at approx 6am, so adjust offset by 1/4
	var offset = offset - (backgroundheight / 4);

	function scrollbackground() {
		// decrease the offset by 1, or if its less than 1 increase it by the background height minus 1
   		offset = (offset < 1) ? offset + (backgroundheight - 1) : offset - 1;
		// apply the background position
   		$('body').css("background-position", "50% " + offset + "px");
   		// call self to continue animation
   		setTimeout(function() {
			scrollbackground();
			}, 100
		);
   	}

	// Start the animation
	scrollbackground();
       });