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:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>无标题页 </title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript">
window.onload = function(){
document.getElementById('click').onclick = function(){
var re = /[1-9]\d*/;
if(re.test(document.getElementById('text').value)){
window.location = 'B.html';
}else{
alert('不是数字');
}
};
};
</script>
</head>
<body>
<input type="text" id="text" />
<input type="button" id="click" value="click" />
</body>
</html>
HTML code:
<textarea id="text">123</textarea><butto
<form id="form1" runat="server">
<div>
<script type="text/javascript">
function oo(a){
document.getEleme ......
树HTML
<div id="DataTreeView" class="dtree" onclick="treeview_click(this);">
<Table> 展开 OR 折叠 </Table>
<DIV> ......
