Text box allow only negative symbol with numeric values

Question

0.00/5 (No votes)

See more:

i am getting for numeric values but not allowing - symbol in text box.

i need proper code for allow negative symbol & numeric value

What I have tried:

<script type="text/javascript">
       function numericdecneg(evt) {
           evt = (evt) ? evt : window.event;
           var charcode = (evt.which) ? evt.which : evt.keyCode;
           if (charcode != 109 && charcode > 31 && (charcode < 48 || charcode > 57) && charcode != 46) {
               return false;
           }
           return true;
       }

   </script>

Posted 11-Jan-17 3:39am

mir raza

Updated 12-Jan-17 3:42am

Add a Solution

Comments

[no name] 11-Jan-17 9:43am

So add the character code for the - sign to your if.

Richard MacCutchan 11-Jan-17 10:02am

Use proper character constants instead of numbers, so your code is easy to read; and less likely to contain mistakes.

Richard Deeming 11-Jan-17 11:55am

Forget Javascript - use <input type="number" ... /> instead. Browser support[^] is almost universal - only IE9 and earlier and Opera Mini don't support it.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Alex Banu · Answer 1 · 2017-01-12T03:42:00

Solution 1

No js needed

<input type="number" name="quantity" min="-9999" max="-1">

Posted 12-Jan-17 3:42am

Alex Banu