I found a problem in my BSP page. I think its not the error of my program because this problem also occurred in other BSP pages.
Problem description: After you open the BSP page, if you firstly click component of Date picker to select date. Everything is correct. But if you firstly click component of dropdown list and then click Date picker to select date, you will not be able to select date.
Who have met this problem?Or who can solve this problem?