contentBody = document.getElementById('content');
content_text = contentBody.innerHTML;
content_text = content_text.replace(/<span>([^@<]+)<\/span>/ig, '<a target=_blank class=bur href=\"$1\">$1</a>');
content_text = content_text.replace(/<span>([_a-zA-Z\d\-\.]+@[_a-zA-Z\d\-]+(\.[_a-zA-Z\d\-]+)+)<\/span>/ig, '<a href=\"mailto:$1?subject=from_www.leto.ukr-biz.net\" class=bur>$1</a>');
contentBody.innerHTML = content_text;