function setupIframe() {
var iframe = document.querySelector('iframe');
var html = "";
if (iframe.className === "limited-quirks") {
html = '' + html;
} else if (iframe.className === "no-quirks") {
html = '' + html;
}
window.quirks = iframe.className === "quirks";
window.win = iframe.contentWindow;
win.document.open();
win.document.write(html);
win.document.close();
['style', 'test', 'ref', 'svg', 'svg_ref'].forEach(function(id) {
win[id] = win.document.getElementById(id);
});
}