code: function prefix(property, scope, onlyPrefixed) {
  
          /* Check non prefixes property if we have to */
          if ((! onlyPrefixed) && (property in scope)) return scope[property];
  
          /* Check the various prefixed properties, if we have one */
          var prefixes = ["Ms", "ms", "Moz", "moz", "WebKit", "webkit"];
          for (var i in prefixes) {
            var prefixed = prefixes[i] + property;
            if (prefixed in scope) return scope[prefixed];
          }
  
          /* Things like "window.crypto" become "window.webkitCrypto" */
          if (property[0] !== property[0].toUpperCase()) {
            return prefix(property[0].toUpperCase() + property.substring(1), scope, true);
          } else {
            return undefined;
          }
        }
docs: /* Find a property with a prefix