title: Unique option selection from drop down?
body: <p>I have an html page which contains 10 dropdowns each having option from 1 to 10. 
  how do i assign options uniquely to all dropdowns .e.g. If i select 1 from dropdown 1 then that particular option is removed from other dropdowns.
  if i diselect anyone then number of that particular dropdown again added in options of dropdowns.</p>