Textbox to accept only numbers (digits) using jquery
- Wednesday, April 16, 2008, 17:33
- how-to, javascript, jquery, tutorial
- 26 comments
Few days back, my friend Parleen asked me how can we make a textbox which just accepts only numbers specially digits only. And, for his I come up with this solution of textbox which only accepts digits, and if you try to enter any alpha bates in it then it displays the error message with animation.
HTML Code
<input type="text" name="quantity" id="quantity" /> <span id="errmsg"></span>
As you can see above, I’ve given the name and id of textbox to “quantity” in this example.This is the textbox which only accepts numbers (digits only). You can see “span” after textbox which is used to display the error message with fading effect using jQuery.
Javascript Code
First of all, we need to use jQuery library as we’re using the jquery’s function to accept only digits.
<script type="text/javascript" src="jquery.js"></script>
Now le’ts write the code in JavaScript using jQuery to accept only digits in textbox and displaying error with animation.
//when key is pressed in the textbox$("#quantity").keypress(function (e)
{
//if the letter is not digit then display error and don't type anything
if( e.which!=8 && e.which!=0 && (e.which<48 || e.which>57))
{
//display error message
$("#errmsg").html("Digits Only").show().fadeOut("slow");
return false;
}
});
When the key is pressed, we’re using the key’s ASCII value to check which button is pressed. In first expression, delete, tab or backspace button is is checked and “8″ is the ASCII values of the Back-space. Digits are checked in the second expression. “48″ is the ASCII values of “0″ and “57″ is the ASCII values of “9″. The the ASCII values of the other digits lies between “48″ to “57″. And, if the key pressed values doesn’t lies withing these range, then we are displaying the error message with jQuery’s fading effect.
And, the “return false” statement means that this functions returns false values which means not to type anything on the text box.
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26 Comments on “Textbox to accept only numbers (digits) using jquery”
Trackbacks
- PHP Coding School » Blog Archive » php tips [2008-04-16 18:09:41]
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Nice little script, it can be very useful for developers, and it provides the user with immediate feedback rather than waiting until they click “submit” and giving them the message then. I’ll definitely have to use it, thanks!
You are always welcome gabe…
What about copy/paste or mark/drag/drop text with mouse?
oh right…..you can write the condition to do that
And continuing on with sunless’s response, it should allow a Ctrl+V for digits. But it doesn’t because the V isn’t a digit.
Along the same lines of what Konr pointed out, none of my other browser keyboard shortcuts work as long as the focus is in that text box. Ctrl+W, for example, does not close the tab.
Very good solution !
I’ll be using this, thnx !!
bug: works shift+ins (paste any text)
bugfix:
$(el).keypress(function (e)
{
//if the letter is not digit then display error and don’t type anything
if((e.shiftKey && e.keyCode == 45) || e.which!=8 && e.which!=0 && (e.which57))
{
//display error message
$(”#errmsg”).html(”Digits Only”).show().fadeOut(”slow”);
return false;
}
});
next bug: ctrl+v and shift+ins allowed in Safari 3.02
I can’t fixed it because of the peculiarities Safari event keyCode’s
Good job Nikolay…….nice to hear that….
Nice little script, beside ctrl+v or shift+ins i found another bug if user pasted alpha chars using right click then pasting it, it doesn’t prevent user from that…
thanks for the code….
This is cool stuff, though I knew it already last year and there was no jQuery then.
good work anyway
oh thanks anyway fedmich….
no more annoying error message
just replace space & alphabet with null
$(’.numberonly’).keyup(function(e) {
if(e.which==13) return false;
c = $(this).val().replace( /[A-Za-z\s]/g ,”);
$(this).val(c);
})
Awesome script, but whenever I try to hit enter to submit the form it shows the error of “Digits Only” how can I fix this?
Thanks helped a lot.
It’s really cool to have this script, thank you.
It does seem though that there should be an easier way to do this in jquery because it’s so common.
For example in most desktop development environments you toggle an option and get this feature.
Yes, I know JQuery and related script has to remain super light, but still…
Thanks!
Thanks was looking for something like this.
Hello,
Very nice code, thank you.
Two questions will be.
How we will use multi-input?
Example:
Input1: errmsg1:
Input2: errmsg2:
Input3: errmsg3:
Input4: errmsg4:
AND
Requirement to start with zero?
Example: 0123, 056784, 045674, 09876, such as.
I am beginner, please try the code I would like
Thanks
thank u rohan …i m liking for this validation from long time ……thankyou again
Thanks ur support
not supporting server control
This script only works for numbers at the top of your keyboard. NumPad numbers wont work.
Any help on checking multiple textboxes with only one function?
Dear Roshan
I have just copied n pasted to ma test page. but it is not working for me. Can you please help me. I m new to web development.
it looked very nice. but not working for me. dont know…
i included the js file.
i my aspx page.
copied ur html code i.e
n wrote the javascript like
$(”#quantity”).keypress(function (e)
{
//if the letter is not digit then display error and don’t type anything
if( e.which!=8 && e.which!=0 && (e.which57))
{
//display error message
$(”#errmsg”).html(”Digits Only”).show().fadeOut(”slow”);
return false;
}
});
i just copied your code.
But it is not working..what should i do???
please help if you can