/* source: http://www.quirksmode.org */
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 applyStyle(value) {
	document.getElementById("style-x").setAttribute("href", value);
	createCookie("siteCSS", value, 60);
}

siteCSS = readCookie("siteCSS") ? readCookie("siteCSS") : "css/default.css";
document.getElementById("style-x").setAttribute("href", siteCSS);

window.onload = function() {
	document.getElementById("style-1").onclick = function() {applyStyle("css/default.css");}
	document.getElementById("style-2").onclick = function() {applyStyle("css/alternate.css");}
}