Using Javascript to Validate Format of Text Box

[ejrhodes]

I have a text box on my form that needs to be in the following format (the leading 0 is not required for mm or dd)

mm/dd/yyyy hh:mm

The hh:mm is optional, but if they put a time value in, it should be in that format.

Can someone provide me with a function I can call onblur of the textbox that will provide this validation?

Thanks

 

[tsdragon]

Assuming hh:mm is 24-hour time (no AM/PM):

function chkDate(pDate) {
myRe = new RegExp("^(0?[1-9])|(1[012])/(0?[1-9])|([12][0-9])|(3[01])/[0-9]{4}( ([01]?[0-9])|(2?[0-3]):[0-6][0-9])?$");
if ( myRe.test(pDate) )
   // valid date/time
else
   // invalid date/time
}

That regex could be a little more complete. For instance, it will allow up to 31 days in ANY month, and the year can be ANY 4 digits. But it will catch things like 0/0/1234 or 34:99 for time.


Tracy Dryden

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