Problem with setting an initial time value to Date Time Picker

I am working on an application to store the daily activities of employees.
It has two datetimepickers to capture the starting and ending time of work.
The starting time needs to be set to 12.01AM initially.
If a time beyond this is selected ,application will not work.
Maximum and minimum value can be set for date.But i couldnt set values for time.
I am using client-side scripting with VBScript.
Plz help
SJP

[461 byte] By [sjphere] at [2007-12-16]