function setActiveStyleSheet(title) { var i, a, rel; for (i = 0; (a = document.getElementsByTagName("link")[i]); i++) { rel = a.getAttribute("rel"); if (rel && rel.indexOf("style") != -1 && a.getAttribute("title")) { a.disabled = true; if (a.getAttribute("title") == title) a.disabled = false; } } }
function getActiveStyleSheet() {
    var i, a; for (i = 0; (a = document.getElementsByTagName("link")[i]); i++) { if (a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title"); }
    return null;
}
function getPreferredStyleSheet() {
    var i, a; for (i = 0; (a = document.getElementsByTagName("link")[i]); i++) { if (a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("rel").indexOf("alt") == -1 && a.getAttribute("title")) return a.getAttribute("title"); }
    return null;
}
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.onload = function(e) { var cookie = readCookie("style"); var title = cookie ? cookie : getPreferredStyleSheet(); setActiveStyleSheet(title); }
window.onunload = function(e) { var title = getActiveStyleSheet(); createCookie("style", title, 365); }
var cookie = readCookie("style"); var title = cookie ? cookie : getPreferredStyleSheet(); setActiveStyleSheet(title);