在HTML表单的文本输入字段上选择后，无法使DatePicker正常工作

I have a HTML edit form that shows fields from database and allow users to edit the database fields. For one of the fields which is known as "detentiondate", I plan to put a date picker. So that when clicked to edit the date, a datepicker will be shown and I can retrieve the new date and update to the database. My date format is in mm/dd/yyyy (e.g. 01/28/2016).I have a HTML edit form that shows fields from