[Old Pedant]

Okay...minor mod:

<script>
(
  function() 
  {
      var button = document.getElementById("store");
      var wait = setInterval(clickIt,10000);

      button.onclick = 
          function()
          { 
              alert("saved"); // optional
              clearInterval(wait);
              wait = setInterval(clickIt,10000);
          };

      function clickIt()
      {
          if ( ! button.disabled) { button.click( ); }
      }
  }
)();
</script>

But now that's not really different than your code.