Modernizr Test for VML

modernizr-vml.js

  // Add a Modernizr check for VML
  Modernizr.addTest('vml', function() {
    // Adapted from http://stackoverflow.com/questions/654112/how-do-you-detect-support-for-vml-or-svg-in-a-browser
    var a = document.body.appendChild(document.createElement('div'));
    a.innerHTML = '<v:shape id="vml_flag1" adj="1" />';
    var b = a.firstChild;
    b.style.behavior = "url(#default#VML)";
    var supportsVml = b ? typeof b.adj == "object": true;
    a.parentNode.removeChild(a);
    return supportsVml;
  });

You can't use document.body inside Modernizr tests - there's a better way to do this. Please see http://www.paulirish.com/2011/surefire-dom-element-insertion/

Instead of:

    var a = document.body.appendChild(document.createElement('div'));

You should do this:

    var a = document.createElement('div');
    var ref = document.getElementsByTagName('script')[0];
    ref.parentNode.insertBefore(a, ref);