Using Date.parse to validate time entries

[awingnut]

I am trying to validate a text field that must contain a valid time. I thought I could do it easily using Date.parse(). According to the documentation if just a time string is passed to the function it will return a number (milliseconds since the Epoch). I then use 'isNaN' which should be false if an invalid time string was passed (a non number was returned by Date.parse()). So, either it does not work the way I interpreted the documentation or there is a syntax problem with the string. What I am passing to test with is "08:30". Can someone help me on this one? TIA.

 

[theboyhope]

IIRC, it'll expect a date and time string. Try passing something like 01/01/1997 08:30 to see what happens.

 

[BillyRayPreachersSon]

If you just want to validate times in the format "xx:xx", I think it might be easier to split on the colon, and detect for the presence of a number in the resulting two array elements, and that they are within the bounds you require (0-23, 1-12, 0-59, etc).

Hope this helps,
Dan



The answers you get are only as good as the information you give!

 

[awingnut]

theboyhope,

I thought of that myself but when I tried it, it didn't work. However, based on your suggestion, I tried it again. This time is worked so obviously I did something wrong the first time. Thanks for making me go back.

 

[tsdragon]

You could also use a regular expression to validate the time. That's part of what they're for.


Tracy Dryden

Meddle not in the affairs of dragons,
For you are crunchy, and good with mustard.