title: Setting a cookie value to a incrementing int
body: <p>Is there a integer element for a cookie? I need the cookie to increment by 10 everytime a certain button is pushed. How can I start the cookie at 0 the first time and it's next value is based on it's current state.</p>
  
  <p>document.cookie += 10;<br>
  gives 10, then 1010, then 101010.<br>
  Right I dea but I need integer values-<br>
  Need 10, 20, 30, etc...</p>