The Nitobi Calendar has a number of events you can subscribe to to implement full client-side validation.

Invalid Dates

The Nitobi Calendar distinguishes between three types of invalid dates:

• Out Of Range Date - If the selected date falls outside the range defined by the mindate and maxdate attributes.
• Invalid Format - If the date isn't a valid format (e.g. if the date entered into the DateInput field doesn't match the edit mask).
• Disabled Date - If the date to be selected is defined as disabled.

Each type of invalid date has a JavaScript event associated with it which you can subscribe to through the declaration using the following attributes (defined on the ntb:datepicker tag):

• onsetoutofrangedate
• onsetinvaliddate
• onsetdisableddate

Here is an example implementation:

<ntb:datepicker id="dp" theme="leopard" mindate="yesterday" ondateselected="resetError()" onsetinvaliddate="handleInvalid(eventArgs)" onsetoutofrangedate="handleOutOfRange(eventArgs)">
   <ntb:dateinput displaymask="dd MMM yyyy" editmask="yyyy-MM-dd"></ntb:dateinput>
   <ntb:calendar></ntb:calendar>
</ntb:datepicker>