function getCookie(name) {
    var sPos = document.cookie.indexOf(name + "=");
    var len = sPos + name.length + 1;
    if ((!sPos) && (name != document.cookie.substring(0, name.length))){
        return null;
    }
    if (sPos == -1){
        return null;
    }
    var ePos = document.cookie.indexOf(';', len);
    if (ePos == -1) ePos = document.cookie.length;
    return unescape(document.cookie.substring(len, ePos));
}
function setCookie(name, value){
	var today = new Date();
    var date = new Date(today.getFullYear(),today.getMonth()+1,today.getDay());
    document.cookie = name+'='+escape(value) + "; expires=" + date +"; path=/";
}
function deleteCookie(name){
	document.cookie = name + "=;expires=Fri, 14 Oct 2005 12:00:00 UTC; path=/";
} 
function switchColour(accent) {
	document.body.style.backgroundColor = "#"+accent;
	document.getElementById("page").style.backgroundColor = "#"+accent;
	document.getElementById("glasses_link").style.backgroundColor = "#"+accent;
	if (document.getElementById("sidebar"))
		document.getElementById("sidebar").style.backgroundColor = "#"+accent;
	deleteCookie("accent");
	setCookie("accent",accent,1,"/");
}
window.onload = function() {
	var colour = getCookie("accent");
	switchColour(colour);
	document.getElementById("colour_red").onclick = function() { switchColour("aa1100"); }
	document.getElementById("colour_blue").onclick = function() { switchColour("336699"); }
	document.getElementById("colour_yellow").onclick = function() { switchColour("cc9900"); }
	document.getElementById("colour_green").onclick = function() { switchColour("999933"); }
	document.getElementById("colour_orange").onclick = function() { switchColour("cc6600"); }
}