jerry,
how about parseFloat() or parseInt(), depending on whether you only want
integers?
something like
function check_numeric( obj )
{
// parseInt() returns NaN (Not a Number)
// if it can't parse an integer out of the string
if( isNaN( obj.value.parseInt() ) )
{
alert( "That is not a number!" );
obj.focus();
return false;
}
else
return true;
}
and your input box can check this onblur (when it loses focus) like so -
<input name="numberbox" type="text" ...... onblur="check_numeric(this);">
or you can check it in the form.onsubmit() -
<form ...... onsubmit="return(check_numeric( numberbox ));">
A good reference for JS (and VBS) functions can be found at
http://msdn.microsoft.com/scripting/default.htm
Hope that helps
Alistair Davidson
Senior Web Developer
Rocom New Media
http://www.rocomx.net
-----Original Message-----
From: Jerry Staple [mailto:[EMAIL PROTECTED]]
Sent: 05 July 2001 09:07
To: CF-Talk
Subject: Data Validation
Hi,
Could anyone inform me of the best javascript function to validate a
textbox, so that only a number can be entered.
Many Thanks
Jerry Staple
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