How to limit the from to date range when all day event check box is not selected

Hi,

I'm developing a leave management application and I have 2 types of leaves. Full day leave and half day leave. I want to limit the from and to date time pickers to same day if the full day event check box is not clicked in the default popup that appears in the add event popup.

 Currently it shows 1 day difference in from and to date pickers when full day event check box is not clicked and user can select any day with any gap in from and to date pickers. 

 I've tried to do it but failed. Would be grate if someone can help me on doing this.

 Thanks.