// JavaScript Document

setActiveStyleSheet("small");

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 getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alternate styl") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}

function enlarge() {
    var val = getActiveStyleSheet();

    switch (val) {
       case "small": val = "medium";
               break;
       default: val = "large";
               break;
       
    }
    setActiveStyleSheet(val);
}

function reduce() {
    var val = getActiveStyleSheet();
    switch (val) {
       case "large": val = "medium";
               break;
       default: val = "small";
               break;
       
    }
    setActiveStyleSheet(val);
}


window.onload = function(e) {
  setActiveStyleSheet("small");
}