DatePicker: Disable auto-popup on receiving focus

Hi!

Is it somehow possible to disable the popup of the javascript calendar when a datepicker receives the focus (mouse click into the control or tab-click)

This requirement is caused by power users, which process UI forms without the help of the mouse. (An alternative would be the use of the standard text input - but unfortunately, thats not what the users want)

Any help is appreciated.
Thanks