function setActiveStyleSheet(title)   {      var i, a, main;      for(i = 0; (a = document.getElementsByTagName("link")[i]); i++)      {         if(               a.getAttribute("rel") &&               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") &&               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") &&               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;   }   function toggleNav()   {      target1 = document.getElementById('nav');      target2 = document.getElementById('content');      if(target1.style.display == "none")      {         target1.style.display = "";         target2.style.width = '500px';         createCookie("hidenav", 0, 30);      }       else       {         target1.style.display = "none";         target2.style.width = "608px";         createCookie("hidenav", 1, 30);      }   }   function adjustNav()   {      target1 = document.getElementById('nav');      target2 = document.getElementById('content');      if(readCookie("hidenav") == 1)      {         target1.style.display = "none";         target2.style.width = "608px";      }   }   window.onload = function(e)   {      adjustNav();         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);