title: Drop down values disappearing if i click submit button more than one time
body: <p>I have created a php page with 2 drop down boxes, submit and cancel button.</p>
  
  <p>If I select values in both drop down boxes and press submit button, it will redirect to the same page and it will display the selected values. Now the problem is, if I click on submit button one more time (without selecting drop down boxes), the selected values will disappear from drop-down boxes (drop down boxes will be empty). </p>
  
  <p>Could anyone please help me to, retain the values in drop-down boxes if I click submit button more than one times?</p>
  
  <p>Thanks in advance.</p>
  
  <p>Br,
  Mahadev</p>