function setActiveStyleSheet(title) {



  var i, a, main;



  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {



    if(a.getAttribute("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);