Redirect timer on successful WebForm submition
Add this code in webform-confirmation.tpl.php

$(document).ready(function() {
  var delay = 10 ;
  var url = "http://google.com";
  function countdown() {
  setTimeout(countdown, 1000) ;
  $('.webform-confirmation').html("Redirecting in "  + delay  + " seconds.");
  delay --;
  if (delay &lt; 0 ) {
  window.location = url ;
  delay = 0 ;
  }
 }
countdown() ;
});