Thanks for the help, it's working now.
My finished validation method looks like this:
jQuery.validator.addMethod ('ccard', function (value, elem)
{
var pattern = new RegExp (/\*{9,15}[0-9]{4,4}/i);
if (pattern.test (value))
{
return (true);
}
else
if (jQuery.validator.methods.creditcard.call (this, value, elem))
{
return (true);
}
else
{
return (this.optional (elem));
}
}, 'Enter a valid credit card number');
On May 15, 9:22 pm, "Jörn Zaefferer" <[EMAIL PROTECTED]>
wrote:
> Ah, should've tried it before posting. This should work:
>
> jQuery.validator.addMethod ('ccard', function (value, elem) {
> return (jQuery.validator.methods.creditcard.call(this, value, elem));
>
> }, 'Enter a valid credit card number');
>
> Jörn
>
> On Thu, May 15, 2008 at 5:09 PM, Gordon <[EMAIL PROTECTED]> wrote:
>
> > I tried writing a test function that just calls the existing function
> > so it should give the same results.
>
> > jQuery.validator.addMethod ('ccard', function (value, elem)
> > {
> > return (jQuery.validator.methods.creditcard (value, elem));
> > }, 'Enter a valid credit card number');
>
> > Unfortunately it didn't work, it just caused firebug to log an
> > error.
>
> > "this.optional is not a function"
>
> > On May 15, 3:21 pm, "Jörn Zaefferer" <[EMAIL PROTECTED]>
> > wrote:
> >> You can access the built-in method directly via
> >> jQuery.validator.methods.creditcard. You have to provide two
> >> arguments, the current value and the element to validate.
>
> >> var element = $(...)[0];
> >> if (jQuery.validator.methods.creditcard(element.value, element))
> >> // valid
> >> else
> >> // invalid
>
> >> Jörn
>
> >> On Thu, May 15, 2008 at 4:14 PM, Gordon <[EMAIL PROTECTED]> wrote:
>
> >> > I want to extend the provided cxreditcard method to count a sequence
> >> > of * characters followed by 4 digits as a valid value. I need this for
> >> > a form where the credit card can be populated from a previously saved
> >> > value. Naturally we don't want to display the full number for
> >> > security reasons but we need for the user to be able to see the last
> >> > four digits.
>
> >> > My idea was to write a new ccard method that calls the pre-existing
> >> > creditcard method. If that method returns true then return true. If
> >> > it returns false then check the field value against a regex /\*+[0-9]
> >> > {4,4}/.
>
> >> > How can I write a custom method that makes use of a built in
> >> > method?
