// if 1 (one), all images will be resized to img_width and img_height, else images will display their correct size
var force_size	= 1;
// desired height and width of images, only takes affect if above is one
var img_width	= 550;
var img_height	= 91;

// time between refreshs of ad locations, to disable refreshs set to 0. In milliseconds, 1000 = 1 second
var refresh_time = 60000;
// maximum amount of refreshs, good to set if a user may be on a page for a long period of time.
var refresh_max = 10;

// if you do not want the same banners to display on the same page then set this to 0, else set it to 1.
// this option is only used if you have put the show_banners() javascript code more than once into a page
var duplicate_banners = 0;


// ignore/skip this line 
var banners = new Array();

// banner list syntax: banners[x] = new banner(website_name, website_url, banner_url, show_until_date);  DATE FORMAT: dd/mm/yyyy
// be sure to increase x by 1 for each banner added!
// to make sure a banner is always rotating, just set the date far into the future, i.e. year 3000
banners[0] = new banner('theglasslab.com', 'http://www.theglasslab.com', 'pics/tglbanner01.jpg', '01/01/4000');
banners[1] = new banner('theglasslab.com', 'http://www.theglasslab.com', 'pics/tglbanner02.jpg', '01/01/4000');
banners[2] = new banner('theglasslab.com', 'http://www.theglasslab.com', 'pics/tglbanner03.jpg', '01/01/4000');
banners[3] = new banner('theglasslab.com', 'http://www.theglasslab.com', 'pics/tglbanner04.jpg', '01/01/4000');
banners[4] = new banner('theglasslab.com', 'http://www.theglasslab.com', 'pics/tglbanner05.jpg', '01/01/4000');
banners[5] = new banner('theglasslab.com', 'http://www.theglasslab.com', 'pics/tglbanner07.jpg', '01/01/4000');
banners[6] = new banner('theglasslab.com', 'http://www.theglasslab.com', 'pics/tglbanner08.jpg', '01/01/4000');

//         				There is no need to edit below here
///////////////////////////////////////////////////////////////////////////////////

var used = 0;
var first_pass = 0;
var location_counter = 1;
var refresh_counter = 1;

function banner(name, url, image, date)
{
	this.name	= name;
	this.url	= url;
	this.image	= image;
	this.date	= date;
	this.active = 1;
}

function show_banners()
{
	var html = '<div id="adLocation-' + location_counter + '"></div>';
	document.write(html);
	display_banners(location_counter);
	location_counter++;
}

function display_banners(location)
{
	if(location == '' || !location || location < 0)
	{
		// no location given
		return;
	}
	
	var am	= banners.length;
	
	if((am == used) && duplicate_banners == 0) {
		// all banners have been used
		return;
	}

	var rand	= Math.floor(Math.random()*am);	
	var bn 		= banners[rand];
	
	var image_size 	= (force_size == 1) ? ' width="' + img_width + '" height="' + img_height + '"' : '';
	var html 		= '<a href="' + bn.url + '" title="' + bn.name + '" target="_self"><img border="0" src="' + bn.image + '"' + image_size + ' alt="' + bn.name+ '" /></a>';
	
	var now		= new Date(); 

	var input	= bn.date;
	input		= input.split('/', 3);
	var end_date	= new Date();

	end_date.setFullYear(parseInt(input[2]), parseInt(input[1]) - 1, parseInt(input[0]));
	
	if((now < end_date) && bn.active == 1) 
	{
		var location_element = document.getElementById('adLocation-' + location);
		
		if(location_element == null)
		{
			// ad location doesn't exist
			alert('Webmaster banner rotator\nError: adLocation doesn\'t exist!');
		}
		else
		{
			location_element.innerHTML = html;
			
			if(duplicate_banners == 0)
			{
				bn.active = 0;
				used++;
			}
		}
	}
	else
	{
		display_banners(location);
	}
}

function refresh_banners()
{
	if((refresh_counter == refresh_max) || refresh_time < 1)
	{
		clearInterval(banner_refresh);  
	}
	used = 0;
	for(i = 0; i < banners.length; i++)
	{
		banners[i].active = 1;
	}
	for(i = 1; i < location_counter; i++)
	{
		display_banners(i);
	}
	refresh_counter++;
}
var banner_refresh = window.setInterval(refresh_banners, refresh_time);