var options = { attributes: { rel: 'nofollow', title: 'Click for more information', }, className: 'internal-link', format: { url: function (value) { return value } }, ignoreTags: ['a'], validate: { url: function (value) { return value; } } }; var str = 'Perry Knitting Mill in the weaving cloth section, taken on January 17, 1969.'; document.write(linkifyHtml(str, options));