Aangeraden is deze snippet in een Safari only hack te zetten

CSS

@media all and (-webkit-min-device-pixel-ratio:0) {
textarea { resize:none; }
}

HTML

In de <header>

<link rel="stylesheet" type="text/css" href="normaal.css" title="normaal">
<link rel="alternate stylesheet" type="text/css" href="groter.css" title="groter">
<link rel="alternate stylesheet" type="text/css" href="giga.css" title="gigant">
<script type="text/javascript" src="styleswitcher.js"></script>

Style Switcher links

<a title="normaal" onclick="setActiveStyleSheet('normaal'); return false;" href="#">a</a>
<a title="groter" onclick="setActiveStyleSheet('groter'); return false;" href="#">A</a>
<a title="gigantisch" onclick="setActiveStyleSheet('gigant'); return false;" href="#">A+</a>

JavaScript

styleswitcher.js

<![CDATA[
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("alt") == -1
       && a.getAttribute("title")
       ) return a.getAttribute("title");
  }
  return null;
}
function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}
function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}
window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveStyleSheet(title);
}
window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}
var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveStyleSheet(title);
]]>

CSS

Normaal

body {
font-size : 1.5em;
background-color : #CCCC33;
}

Groter

body {
font-size : 1.8em;
background-color : #99CC66;
}

Giga

body {
font-size : 2.3em;
background-color : #99CC66;
}