function setActiveStyleSheet(title) {
  var i,a;
  
  for(i=0; (i < document.getElementsByTagName("link").length); i++) {
    try {
      a = document.getElementsByTagName("link")[i];
      if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {      
        a.disabled = true;
        if(a.getAttribute("title") == title) a.disabled = false;
      }
    }
    catch(ex) {
      // Silent exception
    }
  }
}

function getActiveStyleSheet() {
  var i,a;
  
  for(i=0; (i < document.getElementsByTagName("link").length); i++) {
    try {
      a = document.getElementsByTagName("link")[i];
      if (a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) { 
        return a.getAttribute("title");    
      }
    }
    catch(ex) {
      // Silent exception
    }    
  }  
}