Demo Blockquote Keren

<script type='text/javascript'> //<![CDATA[ var pre = document.getElementsByTagName('blockquote'), pl = pre.length; for (var i = 0; i < pl; i++) { pre[i].innerHTML = '<span class="line-number"></span>' + pre[i].innerHTML + '<span class="cl"></span>'; var num = pre[i].innerHTML.split(/n/).length; for (var j = 0; j < num; j++) { var line_num = pre[i].getElementsByTagName('span')[0]; line_num.innerHTML += '<span>' + (j+1) + '</span>'; } } //]]> </script>