// From http://www.quirksmode.org/js/cookies.html

function createCookie(name,value,days)
{
	if (days)
	{
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name)
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++)
	{
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name)
{
	createCookie(name,"",-1);
}

function startSlideShow()
{
	createCookie('SlideShow','On','');
}	


function controlSlideShow(NextImgId)
{
	// If less than 10 convert to srting and prepend leading zero
	if(NextImgId < 10)
	{
		NextImgId = '0' + NextImgId.toString();
	}
	
	var nextSlide=NextImgId + '.asp';
	
	if(readCookie('SlideShow')=='On')
	{
		createCookie('SlideShow','Off','');
		document.getElementById('slideShowControl').src='/i/artists/pause_slideshow.gif';
		window.location.href=window.location.href;
	}
	else
	{
		createCookie('SlideShow','On','');
		document.getElementById('slideShowControl').src='/i/artists/start_slideshow.gif';
		goToNextSlide(nextSlide);
	}
}

function goToNextSlide(nextSlide)
{
	var nextSlide = nextSlide;
	window.location = nextSlide;
}

function advanceSlide(nextSlide)
{
	var nextSlide = nextSlide;
	
	if(readCookie('SlideShow')=='On')
	{
		//window.alert(FOO);
		setTimeout("goToNextSlide('" + nextSlide + "')",8000);
	}
}
	
function getSlideButton()
{
	if(readCookie('SlideShow')=='On')
	{
		document.getElementById('slideShowControl').src='/i/artists/pause_slideshow.gif';
	}
	else
	{
		document.getElementById('slideShowControl').src='/i/artists/start_slideshow.gif';
	}
}
	
function InitSlideShow(NextImgId)
{

	var nextSlide=NextImgId + '.php';
	
	createCookie('SlideShow','On','');
	
	advanceSlide(nextSlide);

}