isNan

[Fiona]

I'm learning javaScript and am trying to design an order form and am encountering
difficulty in using isNan.
The value isn't passing from the HTML input into the JavaScript function.
Below are some details:

FUNCTION DETAILS
function Validate(f){

if (isNan(value))
{
alert ("Please enter a valid number.");
}
}
FORM DETAILS
<TD>
<CENTER><INPUT maxLength=1 name=txtCr1 size=1 value =0
onChange="Validate(order.form)"></CENTER></TD></TR>

I'd appreciate any help you can give me.
thanks
fiona

[Paul Clapham]

Your function "Validate" has a parameter whose name is "f". But you don't
refer to this parameter anywhere in the body of the function. Your call to
"isNan" refers to some other object named "value" whose declaration I don't
see here.

PC2

Fiona <ulfan@dewey.newcastle.edu.au> wrote in message
news:39cee603$1@news.devx.com...
>
> I'm learning javaScript and am trying to design an order form and am
encountering
> difficulty in using isNan.
> The value isn't passing from the HTML input into the JavaScript function.
> Below are some details:
>
> FUNCTION DETAILS
> function Validate(f){
>
> if (isNan(value))
> {
> alert ("Please enter a valid number.");
> }
> }
> FORM DETAILS
> <TD>
> <CENTER><INPUT maxLength=1 name=txtCr1 size=1 value =0
> onChange="Validate(order.form)"></CENTER></TD></TR>
>
> I'd appreciate any help you can give me.
> thanks
> fiona