title: How to set datetimepicker value to 1st of selected month automatically?
body: <p>when i check monthwise radiobtn the datetimepicker value should automatically set to 1st day of selected month. </p>
  
  <p>how to do this??</p>
  
  <p>tried </p>
  
  <pre><code>dtpDate.value=new Date(1:MM:YYYY)
  </code></pre>
  
  <p>but not working as expected..</p>