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);