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;
         }
      }
   }
} // setActiveStyleSheet

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;
} // getActiveStyleSheet

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;
} // getPreferredStyleSheet

if (window.onunload != null) {
   var funcCSSU = window.onunload;
   window.onunload = function() { funcCSSU(); cssonunload(); }
} else {

}