docs: function (elm, properties) {
          for (var prop in properties) {
              if (properties.hasOwnProperty(prop)) {
                  try {
                      var name = prop.replace(/\-([a-z])/ig, innerReplaceRule);
                      var value = properties[prop];
                      elm.style[name] = (typeof value == 'number' && name != 'zIndex') ? (value + 'px') : value;
                  } catch (ex) {}
              }
          }
      }