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("illuticStyle"); 
 
          var title = cookie ? cookie : getPreferredStyleSheet(); 
 
          setActiveStyleSheet(title); 
  } 
 
  window.onunload = function(e) 
  { 
          var title = getActiveStyleSheet(); 
 
          createCookie("illuticStyle", title, 365); 
  } 
 
  var cookie = readCookie("illuticStyle"); 
  var title = cookie ? cookie : getPreferredStyleSheet(); 
 
  setActiveStyleSheet(title);