code: function(content) {
                  // Convert bad values into empty strings
                  var isInvalid = content === null || content === undefined || isNaN(content) && '' + content === 'NaN';
                  return '' + (isInvalid ? '' : content);
              }
docs: ##string.js _Miscellaneous string utility functions._ Several of the methods in this plugin use code adapated from Prototype Prototype JavaScript framework, version 1.6.0.1. © 2005-2007 Sam Stephenson