Query in datetime

Hi Buddies,

I have one doubt. In my application i am using start date and end date as date picker. I am using keyboard to change date that date doesnt stored in database
otherwise current date is stored.But i am using date image that change the start date at that time, correctly stored in database that what i changed.

function PickerProSDate_onSelectionChanged(sender, eventArgs)
{
//alert(PickerProSDate.getSelectedDate());
//CalendarProSDate.setSelectedDate(PickerProSDate.getSelectedDate());

var dtProjectStartDate=<%=PickerProSDate.ClientObjectId%>.getSelectedDate()
alert(dtProjectStartDate);

var dtPickerProjectEndDate=PickerProSDate.formatDate(dtProjectStartDate,'MM/dd/yyyy');
alert(dtPickerProjectEndDate);

// ProjectStartDate.callback(dtPickerProjectEndDate);
ProjectPickerStartDate.callback(dtPickerProjectEndDate);
}

this is my code. Hope someone will rectify my doubts.

Thanks