实现对过去,现在以及将来日期的查询,通过在年份对话框中输入要查询的年份，再相应的在月份对应的下拉菜单选择要查询的月份-It can be achieved through the past, present and future date query, the input to query the year on year the dialog box, and then the corresponding in month corresponding drop-down menu select