maybe it's easy to do, but I can't set the initial date of navigator form the
page_load function of my page. The problem is, that the startingdate will be set,
but on the page the navigator will still show the initial date (now).
The navigator is on an updatepanel, which's update mode is set to automatic
(manual is no option, since it already created some bugs with the rendering).
Please help me if you know the solution!