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;

     }

   }

}