<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title> </title>
<script type="text/javascript">
var data =[ {"children":[{"children":[{"children":[],"cls":"file","description":"","expandable":false,"href":"","hrefTarget":"rightFrame","id":"6","leaf":true,"para":"6","pid":"1","text":"電腦1"}],"cls":"folder","description":"","expandable":false,"href":"","hrefTarget":"","id":"1","leaf":false,"para":"1","pid":"0","text":"培訓教材"},{"children":[],"cls":"file","description":"","expandable":false,"href":"","hrefTarget":"rightFrame","id":"2","leaf":true,"para":"2","pid":"0","text":"顧客服務中心"},{"children":[],"cls":"file","description":"","expandable":false,"href&qu
如有一个textbox，用户输入后点button按钮时，实现用JavaScript对textbox输入信息的验证，要求用JavaScript来实现，比如验证用户输入的是否是数字。
希望将HTML代码一并写出来哈，谢谢
HTML code:
<!DOC ......
