// uses function defined in cookies.js

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;
    }
  }
  // save in cookie
  setCookie('zoom', title, 0, '/', 'adelaide.edu.au', 0);
  return false;
}

// change the style sheet to one chosen earlier
function setPrefStyleSheet() {
    var zoom;
    zoom = getCookie('zoom');
    if (zoom && zoom != '' && zoom != 'default') {
        setActiveStyleSheet(zoom);
    }
}