Jquery Truncate text in div + show more link

truncate.js

/**
 * <div class="text">Some text with <b>html</b>... Any length.</div>
 * 
 */
$('.text').each(function(){
    var length = 5;
    var details = $(this);
    var original_html = details.html();
    var original_text = details.text();
    var truncated_text = $.trim(original_text).substring(0, length).split(" ").slice(0, -1).join(" ") + " ";
    var show_more = $('<a href="#more">more</a>');
        show_more.on('click', function(){
          details.html(original_html);
          return false;
        })
    details.html(truncated_text);
    details.append(show_more);
  });