/****** get a random image ********/
var curPix;

var theImage, seenIt, chosenImage, imageLibrary, numberOfImages, newNumberOfImages;

/*****************
Let's Bake Some Cookies!
*****************/

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 = "";
	var ck = name+"="+value+expires+"; path=/";
	document.cookie = ck;
}

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);
}

var seenIt = readCookie("wolskicolours");

/**********
Set Images
**********/


var imageLibrary = new Array(
	"blue",
	"green",
	"orange",
	"pink",
	"purple",
	"red"
);

/**********
Pick Images
**********/
var theImage;

var pickAnImage = function(){
	if (!seenIt || (seenIt.indexOf(imageLibrary.length+"t") != -1)){
		seenIt = "0t,";
	}
	var chosenImage = Math.round(Math.random()*(imageLibrary.length-1));
	while (seenIt.indexOf(","+chosenImage) != -1){
		chosenImage = Math.round(Math.random()*(imageLibrary.length-1));
	}
	seenIt += ","+chosenImage;
	numberOfImages = parseInt(seenIt.slice(0,seenIt.indexOf("t")));
	newNumberOfImages = numberOfImages+1;
	seenIt = newNumberOfImages + seenIt.slice(seenIt.indexOf("t"));
	createCookie("wolskicolours",seenIt,300);
	theImage = imageLibrary[chosenImage];
}

pickAnImage();
document.body.className = theImage;