// setActiveStyleSheet function by Paul Sowden - http://www.alistapart.com/articles/alternate

 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 toggleSpoilers() {
    if (window.document.getElementById("ss_txt").innerHTML == "Uncover all spoilers") {
      setActiveStyleSheet('spoiler_tags_off');
      alert('All spoilers on this page are now uncovered! Use the Topic Options menu to cover them again, or just refresh the page.');
      window.document.getElementById("ss_txt").innerHTML = "Cover all spoilers";
      return true;
    }
    
    if (window.document.getElementById("ss_txt").innerHTML == "Cover all spoilers") {
      setActiveStyleSheet('spoiler_tags_on');
      window.document.getElementById("ss_txt").innerHTML = "Uncover all spoilers";
      return true;
    }
 }
 
 setActiveStyleSheet('spoiler_tags_on');