$(document).ready(function(){
	/* This code is executed after the DOM has been completely loaded */
	
	// to correct the back button problem
	if (document.getElementById("calendarUse").value = "yes") {
		document.getElementById("calendarUse").value = "no"
	}
	
	var d = new Date();
	var curr_date = d.getDate();
	var curr_month = d.getMonth();
	curr_month++;
	var curr_year = d.getFullYear();
	var date = curr_year + "-" + curr_month + "-" + curr_date
	if (document.getElementById("calendardate").value != date) {
		document.getElementById("calendardate").value = date
	}
	
	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){
			/* On a thumbnail click */
			
			// check whether date interval or calendar date
			var useCal = document.getElementById("calendarUse").value
			//alert(useCal);
			if (useCal == "no") {
				document.getElementById("calendarUse").value = "yes";
			}
			if (useCal == "yes") {
				document.getElementById("calendarUse").value = "no";
			}
			
			$('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 */
	
});