1<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">234判断数字是否为两位数56body{font:12px/1.5 arial;text-align:center;}7.f-text{width:50px;border:1px solid #ccc;background:#f0f0f0;font-family:inherit;paddin...