很多时候我们需要通过时间话快来选择时间，从而加载指定时间的影像，今天我们选择两种方式进行加载，分别加载时间滑块在控制台和地图上，注意在地图上添加时需要添加一个面板，然后通过面板加载时间滑块
ui.DateSlider(start, end, value, period, onChange, disabled, style)
A draggable target that ranges linearly between two dates. The date slider can be configured to display dates of various interval sizes, including day, 8-day, and year. The value of the slider is displayed as a label alongside it.
Arguments:
start (Date|Number|String, optional):
The start date, as a UTC timestamp, date string, or ee.Date. Defaults to one week ago.
end (Date|Number|String, optional):
The end date, as a UTC timestamp, date string, or ee.Date. Defaults to today.
value (Date|Number|String, optional):
The initial value. The value is an array consisting of the start and end date for the sele