$(document).ready(function(){
	/* This code is executed after the DOM has been completely loaded */
	
	var totWidth=0;
	var positions = new Array();

	if($('#slides').length > 0) {
		$('#slides .slide').each(function(i){

			/* Traverse through all the slides and store their accumulative widths in totWidth */

			positions[i]= totWidth;
			totWidth += $(this).width();

			/* The positions array contains each slide's commulutative offset from the left part of the container */

			if(!$(this).width())
			{
				alert("Please, fill in width & height for all your images!");
				return false;
			}

		});

		$('#slides').width(totWidth);

		/* Change the cotnainer div's width to the exact width of all the slides combined */

		$('#menu ul li a').click(function(e,keepScroll){

				/* On a thumbnail click */

				$('li.menuItem').removeClass('act').addClass('inact');
				$(this).parent().addClass('act');

				var pos = $(this).parent().prevAll('.menuItem').length;

				$('#slides').stop().animate({marginLeft:-positions[pos]+'px'},450);
				/* Start the sliding animation */

				e.preventDefault();
				/* Prevent the default action of the link */


				// Stopping the auto-advance if an icon has been clicked:
				if(!keepScroll) clearInterval(itvl);
		});

		$('#menu ul li.menuItem:first').addClass('act').siblings().addClass('inact');
		/* On page load, mark the first thumbnail as active */



		/*****
		 *
		 *	Enabling auto-advance.
		 *
		 ****/

		var current=1;
		function autoAdvance()
		{
			if(current==-1) return false;

			$('#menu ul li a').eq(current%$('#menu ul li a').length).trigger('click',[true]);	// [true] will be passed as the keepScroll parameter of the click function on line 28
			current++;
		}

		// The number of seconds that the slider will auto-advance in:

		var changeEvery = 10;

		var itvl = setInterval(function(){autoAdvance()},changeEvery*1000);

		/* End of customizations */
	}
});