// Based on StyleSwitcher functions by Paul Sowden
// http://www.idontsmoke.co.uk/ss/
// - - - - - - - - - - - - - - - - - - - - - - - -
// For details, visit ALA:
// http://www.alistapart.com/stories/alternate/

var defStyle = "red";
var curStyle;

function setStyle(colour) {
	var i, sheet;
	for (i = 0; (sheet = document.getElementsByTagName("link")[i]); i++) {
		if (sheet.getAttribute("rel").indexOf("style") != -1 && sheet.getAttribute("title")) {
			sheet.disabled = true;
			if (sheet.getAttribute("title") == colour)
				sheet.disabled = false;
		}
	}
	curStyle = colour;
}

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 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;
}

window.onunload = function(e) {
	createCookie("colourScheme", curStyle, 365);
}

var cookie = readCookie("colourScheme");
var savedStyle = cookie ? cookie : defStyle;
setStyle(savedStyle);