title: On textbox click ,show(pop up) a calendar?
body: <p>I would like to know how can I implement a calendar when the textbox is clicked? 
  Example: When I click a textbox , the calendar will pop up . 
  Like this : <img src="https://i.stack.imgur.com/BvJFj.png" alt="enter image description here"></p>
  
  <p>I clicked the textbox and the calendar showed up.</p>
  
  <p>Thanks</p>