title: Applying regexp in a column of excel for validation
body: <p>I wan to apply a regexp validation on excel.so that if someone enter the wrong value in the cell
  the error message should be shown.
  for example if i applied the regexp "(\d{10},)*\d{10}" on a column for the valid entries and if someone enter the value "asdfgh" in a cell of that column an error message should be thrown</p>
  
  <p>How can I do this</p>