// JavaScript Document

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);
}

var backColor = new Array();

backColor[0] = '#ccffff';
backColor[1] = '#FFFFE0';
backColor[2] = '#ffffcc';
backColor[3] = '#fffffc';
backColor[4] = '#FFFFFF';
backColor[5] = '#cccccc';
backColor[6] = '#FFCCFF';

function changeBG(whichColor){
document.body.style.backgroundColor = backColor[whichColor];
createCookie('backColor', whichColor);
}

if(readCookie('backColor'))
document.write('<style type="text/css">body {background-color: ' + backColor[readCookie("backColor")] + ';}<\/style>');