var positions = new Array();
function autoAdvance()
{
    //Determine Current Active MenuItem
    var current = $('#menu').find('li.act');
    //var current = $('li.menuItem:first');
    
    //Get next MenuItem
	var next = ((current.next().length) ? ((current.next().attr('class') == 'menuItem')? $('li.menuItem:first') :current.next()) : $('li.menuItem:first'));
    //var next = current.next();

    $('li.menuItem').removeClass('act').addClass('inact');
	$(next.addClass('act'));
			
	var pos = $(next.prevAll('.menuItem')).length;
	//alert(pos);
			
	$('#slides').stop().animate({marginLeft:-positions[pos]+'px'},450);
	/* Start the sliding animation */

}

$(document).ready(function(){
	/* This code is executed after the DOM has been completely loaded */
	
	var itvl = setInterval("autoAdvance()",5000);
	
	var totWidth=0;
	//var positions = new Array();
	
	$('#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){
            
            //Stop Auto Advance
            clearInterval(itvl);

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