惯性聚合 高效追踪和阅读你感兴趣的博客、新闻、科技资讯
阅读原文 在惯性聚合中打开

推荐订阅源

Google Online Security Blog
Google Online Security Blog
C
CXSECURITY Database RSS Feed - CXSecurity.com
C
CERT Recently Published Vulnerability Notes
C
Cybersecurity and Infrastructure Security Agency CISA
Cisco Talos Blog
Cisco Talos Blog
Hacker News - Newest:
Hacker News - Newest: "LLM"
Scott Helme
Scott Helme
Project Zero
Project Zero
E
Exploit-DB.com RSS Feed
S
Secure Thoughts
K
Kaspersky official blog
L
Lohrmann on Cybersecurity
NISL@THU
NISL@THU
WordPress大学
WordPress大学
N
News and Events Feed by Topic
钛媒体:引领未来商业与生活新知
钛媒体:引领未来商业与生活新知
L
LINUX DO - 热门话题
小众软件
小众软件
P
Privacy & Cybersecurity Law Blog
博客园 - 聂微东
Google DeepMind News
Google DeepMind News
H
Hackread – Cybersecurity News, Data Breaches, AI and More
A
About on SuperTechFans
Hacker News: Ask HN
Hacker News: Ask HN
AWS News Blog
AWS News Blog
Cyber Security Advisories - MS-ISAC
Cyber Security Advisories - MS-ISAC
H
Hacker News: Front Page
F
Full Disclosure
Latest news
Latest news
Schneier on Security
Schneier on Security
The Hacker News
The Hacker News
T
Troy Hunt's Blog
www.infosecurity-magazine.com
www.infosecurity-magazine.com
Jina AI
Jina AI
Martin Fowler
Martin Fowler
P
Proofpoint News Feed
TaoSecurity Blog
TaoSecurity Blog
G
GRAHAM CLULEY
Forbes - Security
Forbes - Security
V
V2EX - 技术
酷 壳 – CoolShell
酷 壳 – CoolShell
V
Vulnerabilities – Threatpost
C
Cyber Attacks, Cyber Crime and Cyber Security
MongoDB | Blog
MongoDB | Blog
博客园 - 三生石上(FineUI控件)
S
SegmentFault 最新的问题
Hugging Face - Blog
Hugging Face - Blog
P
Privacy International News Feed
C
Check Point Blog
N
News and Events Feed by Topic

博客园 - 博闻李

ASP.NET AJAX中PageMethods方法调用示例 - 博闻李 - 博客园 SQL Server数据库所有表索引性能分析 SQL Server数据库所有表重建索引 查询数据库字段所在的位置 查询时锁的使用[转] DBCC DBREINDEX重建索引提高SQL Server性能[引] VS2008 Web Application和Web Site的区别[转] IIS Temporary ASP.NET Files拒绝访问解决方案 - 博闻李 WebDAV是什么?[引] ASP.NET C# 访问Oracle数据库示例 VSTS 2008的TFS安装实战[转] Oracle PL/SQL常用函数列表[转载] Oracle初学笔记 SQL Server 索引结构及其使用(一)[转] SQL数据库设计经验[转] 一套外企的数据库设计面试题[转] UML在关系型数据库设计中的应用[转] 数据库设计范式深入浅出[转] showModalDialog和showModelessDialog使用[转]
Javascript键盘输入相关 - 博闻李 - 博客园
博闻李 · 2009-03-23 · via 博客园 - 博闻李

<script language="javascript">
function CheckMyForm()
{
 var txt = myform.mytext.value;
 if(checknumber(txt))
 {
  alert("不是数字!");
  return false;
 } 
 alert("你输入的是数字!"); 
 return true;
}
function checknumber(String)
{
 var Letters = "1234567890";
 var i;
 var c;
 for( i = 0; i < String.length; i ++ )
 {
  c = String.charAt( i );
  if (Letters.indexOf( c ) ==-1)
  {
   return true;
  }
 }
 return false;
}
</script>
<body >
<form name="myform" onSubmit="return CheckMyForm()">
<input type="text" name="mytext">
<input type="submit" name="mysubmit">
<br><br>
<input type="text" name="textbox" onKeydown="javascript:if (event.keyCode < 48 || event.keyCode > 57) event.returnValue = false; else alert(event.keyCode);"> 过滤键盘输入,只有数字按键是有效的输入。
</form>
</body>