检查字段是否存在无效字符 [英] Checking a field for invalid chars

问题描述

大家好


无论如何，在我提交表格之前，我可以查看

输入字段的内容，看它只包含字母和数字。


谢谢


罗比

Hi All

Is there anyway that before I submit a form I can check the contents of an
input field to see that it only contains letters and numbers.

Thanks

Robbie

推荐答案

写新闻：alt。 www.webmaster，comp.lang.javascript

从Posted by Supernews的安全性， http：//www.supernews。 com

自助餐厅

Astra< #@Spam.com>说：

Writing in news:alt.www.webmaster,comp.lang.javascript
From the safety of the Posted via Supernews, http://www.supernews.com
cafeteria
Astra <[e-mail]> said:

嗨所有


你好吗？

在我提交表格之前还有吗我可以检查
输入字段的内容，看它只包含字母和数字。

Hi All
How do you do?
Is there anyway that before I submit a form I can check the contents of
an
input field to see that it only contains letters and numbers.

yes - 通常的警告适用。


你想要的是一个正则表达式。


-

William Tasso

**照常营业

yes - usual caveats apply.

What you want is a regular expression.

--
William Tasso

** Business as usual

Astra写道：

无论如何，在我提交表格之前，我可以查看内容一个
输入字段，看它只包含字母和数字。

Is there anyway that before I submit a form I can check the contents of an
input field to see that it only contains letters and numbers.

为什么你开始关于这个主题的两个主题？我已回复了一个名为''阻止用户输入除字母以外的任何内容和

数字''的那一个

。


-

萨法拉（Stephen Morley）
http://www.safalra.com/programming/javascript/

Why did you start two threads on this subject? I''ve replied in the one
titled ''Stopping user from inputting anything other than letters and
numbers''.

--
Safalra (Stephen Morley)
http://www.safalra.com/programming/javascript/

Hi William


我只是找不到字母和数字的Reg Exp语法，例如AZ，

az和0-9。


Do你知道它是什么吗？


问候


罗比

威廉塔索 < SP ********* @ tbdata.com>在留言中写道

news：op ******************* @ tbdata.com ...

写在新闻：alt。 www.webmaster，comp.lang.javascript

从Posted by Supernews的安全性， http://www.supernews.com

自助餐厅

Astra< #@Spam.com>说：

Hi William

I just can''t find the Reg Exp syntax for just letters and numbers, eg A-Z,
a-z and 0-9.

Do you know what it is?

Regards

Robbie
"William Tasso" <Sp*********@tbdata.com> wrote in message
news:op*******************@tbdata.com...
Writing in news:alt.www.webmaster,comp.lang.javascript
From the safety of the Posted via Supernews, http://www.supernews.com
cafeteria
Astra <[e-mail]> said:

嗨所有


你好吗？

在我提交表格之前还有吗我可以检查
输入字段的内容，看它只包含字母和数字。

Hi All
How do you do?
Is there anyway that before I submit a form I can check the contents of
an
input field to see that it only contains letters and numbers.

yes - 通常的警告适用。


你想要的是一个正则表达式。


-

William Tasso

**照常营业

yes - usual caveats apply.

What you want is a regular expression.

--
William Tasso

** Business as usual

这篇关于检查字段是否存在无效字符的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！