// activate a random stylesheet

function setRandomStyleSheet() {

    var scene=Math.floor(Math.random()*5);
    ++scene;
    setActiveStyleSheet(scene);
}


// from Paul Sowden's ALA article: 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;
     }
   }
}