var settings = {
	'force_size':			0,
	'img_width':			465,
	'img_height':			81,
	
	'refresh_time':			5000,
	'refresh_max':			100,
	
	'duplicate_banners':	0,
	'location_prefix': 		'adLocation-',
	'location_class':		'swb',			
	'window': 				'_self',		
	'default_ad_loc':		'default'		
}

var used				= 0;
var location_counter	= 0;
var refresh_counter 	= 1;
var map 				= new Array();

function banner(name, url, image, date, loc)
{
	this.name	= name;
	this.url	= url;
	this.image	= image;
	this.date	= date;
	this.active = 1;
	this.oid = 0;

	if(loc != '')
	{
		this.loc = loc;
	}
	else
	{
		this.loc = settings.default_ad_loc;
	}
}

function show_banners(banner_location)
{
	location_counter = location_counter + 1;
	if(banner_location != '' && banner_location != undefined)
	{
		map[location_counter] = banner_location;
	}
	else
	{
		map[location_counter] = settings.default_ad_loc;
	}
	var html = '<div id="' + settings.location_prefix + location_counter + '" class="' + settings.location_class + '"></div>';
	document.write(html);
	display_banners(location_counter);
	
}

function display_banners(location)
{
	var location_banners	= new Array();
	if(location == '' || !location || location < 0)
	{
		return;
	}
	var am	= banners.length;
	if((am == used) && settings.duplicate_banners == 0) {
		return;
	}
	for(i = 0; i < (banners.length); i++)
	{
		banners[i].oid = i;
		if((banners[i].loc == map[location]) && (banners[i].active == 1))
		{
			location_banners.push(banners[i]);
		}
	}
	var rand	= Math.floor(Math.random()*location_banners.length);	
	var bn 		= location_banners[rand];

	var image_size 	= (settings.force_size == 1) ? ' width="' + settings.img_width + '" height="' + settings.img_height + '"' : '';
	var html 		= '<a href="' + bn.url + '" title="' + bn.name + '" target="' + settings.window + '"><div style=";background-image: url('+bn.image+');background-repeat:no-repeat;height:81px;"></div></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(settings.location_prefix + location);

		if(location_element == null)
		{
			//alert('loc not exist');
		}
		else
		{
			location_element.innerHTML = html;
			if(settings.duplicate_banners == 0)
			{
				banners[bn.oid].active = 0;
				used++;
			}
			return;
		}
	}
	else
	{
		display_banners(location);
	}
	return;
}

function refresh_banners()
{
	if((refresh_counter == settings.refresh_max) || settings.refresh_time < 1)
	{
		clearInterval(banner_refresh);  
	}
	used = 0;
	for(j = 0; j < (banners.length); j++)
	{
		banners[j].active = 1;
	}

	for(j = 1; j < (location_counter+1); j++)
	{
		display_banners(j);
	}
	refresh_counter++;
}