Validate Date Range - Javascript

Question

Hi Gang,
This is close to a repost... but more of a followup to a
thread that has
already moved down everyones list.
I have a pretty simple form validation routine I need to
implement, but I
don't know the Javascript syntax well enough to work it out
(my background
is VBscript, but this needs to be client side). I received
some good URL's
to check out some free scripts.. but unfortunately, I don't
know javascript
well enough to hack them up correctly.
If someone can help out with a bit of code, it would be a
huge help.
What I need to do is validate a numeric range as well as not
leaving the
field blank.
For example what is entered must be a number between 1900 and
2006.
Here is what I am using for the basic required function:
The name of the form is "ThisForm_Right", and the field name
is "DOB_Year"
(to explain the piece in the code below)
if (ThisForm_Right.DOB_Year.value=="")
alert ("Please enter the YEAR of your DOB.");
ThisForm_Right.DOB_Year.focus();
return false;
Can some kind sole help with a modified version to also check
for an entered
number range?
I suspect some sort of "And" statement, Like
If
ThisForm_Right.DOB_Year.Value==""
AND
Year.Value NOT between (1900 and 2006)
alert ("Please enter the YEAR of your DOB between 1900 and
2006.");
ThisForm_Right.DOB_Year.focus();
return false;
I just don't know the real syntax :>
Thanks
-D

Answer 1

>thanks you so much for the code, I'll test it out and
reply with >the
>results.
Shouldn't that be "Thanks so much for the Cod"?
"Dave Bar" <[email protected]> wrote in message
news:e28c7t$hk1$[email protected]..
> ahh yes, you are right..
> I should have said OR instead of AND.
> If Field is blank OR range is not between 1900 &
2006. Thanks for catching
> and pointing that out.
>
> thanks you so much for the code, I'll test it out and
reply with the
> results.
> Thanks
> -Dave
>
>
>
>
> "Lionstone" <[email protected]> wrote
in message
> news:e28b1a$fu5$[email protected]..
>> That's probably because you asked for a fish to help
you out
>>
>>> Can some kind sole help with a modified version
to also check for an
>>> entered
>>> number range?
>>
>> and fish can't type.
>>
>> You're off on the logic though, since something is
not likely to be both
>> blank and outside a certain number range. If it's
blank or outside the
>> range, either condition is sufficient for an error,
right?
>> You also want to make sure that no letters, etc, are
entered, because
>> that will mess up your comparisons to the other
numbers. Keeping in mind
>> that javascript validation can be defeated by
sneezing and you'll need to
>> re-validate on the server, this will be closer to
right (not tested).
>>
>> var ThisYear = ThisForm_Right.DOB_Year.value;
>> ThisYear = ThisYear.replace(/[^/d]/g,"");
>> if(ThisYear.length == 0)
>> {
>> alert("Please enter the year of your DOB.");
>> ThisForm_Right.DOB_Year.focus();
>> return false;
>> }
>> else
>> {
>> ThisYear = parseInt(ThisYear);
>> if((ThisYear < 1900) || (ThisYear > 2006))
>> {
>> alert ("The year of your DOB must be between 1900
and 2006.");
>> ThisForm_Right.DOB_Year.focus();
>> return false;
>> }
>> }
>>
>>
>
>