来源: http://roshanbh.com.np/2008/04/textbox-accept-only-numbers-digits.html
<!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
>
<
meta
http-equiv
=
"Content-Type"
content
=
"text/html; charset=UTF-8"
/
>
<
title
>textbox to accept only numbers (digits)</
title
>
<
script
type
=
"text/javascript"
src
="
http://roshanbh.com.np/examples/jquery.js
"
></
script
>
<
script
type
=
"text/javascript"
>
<!--//---------------------------------+
// Developed by Roshan Bhattarai
// Visit http://roshanbh.com.np for this script and more.
// This notice MUST stay intact for legal use
// --------------------------------->
$(document).ready(function(){
//called when key is pressed in 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;
}
});
});
</
script
>
</
script
>
<
style
type
=
"text/css"
>
body {
font: 12px Verdana,Arial, Helvetica, sans-serif;
margin: 10px auto;
width: 400px;
}
p { color:blue; }
#errmsg { color:red; }
</
style
>
</
head
>
<
body
>
<
p
>
The textbox below only accepts digits, Try typing alphabates
</
p
>
Quantity : &
nbsp;
<
input
type
=
"text"
name
=
"quantity"
id
=
"quantity"
/
>&
nbsp;
<
span
id
=
"errmsg"
></
span
>
<
div
align
=
"center"
style
=
"margin-top:20px"
</
div
>
</
body
>
</
html
>
