How can we use jscalendar when we have a "not required" date input field.

Opening the calendar and closing wil not create an input in the field but what can we do if we want to change from "existing date" to "no date" up to now you have to use the keyboard to eleminate the date string.
Is there another way to clean the input ?
Have we overseen something in the docu :-(

Using the keyboard is not really what we want. As setting the focus via mouse will again popup a calendar.

A additional button for "no date" would be cool !

thanks

Gero

BTW: I'm planning to integrate jscalendar as a optional input method for dates into TUTOS http://www.tutos.org