document.write("<li class='prev'>上一组：<a href='http://tuku.health.china.com/health/html/2007-04-09/593.htm' >世界上最柔软的身体</a></li><li class='next'>下一组：<a href='http://tuku.health.china.com/health/html/2007-03-23/503.htm' >在一万倍显微镜下看到的雪花</a></li>");