How to limit the number of iterations done by setInterval

I display video ads to my users. I don't host these ads by the way; I get them from another company.

When ever an ad is clicked it leaves a cookie in the user's browser. I've created a function that checks the existence of a cookie every 10 seconds.

What I would like to do is to limit the number of times this function can run or the number of seconds it can run for.

Below is the function:

function checkCookie()
{
var cookie=getCookie("PBCBD2A0PBP3D31B");
  if (cookie!=null && cookie!="")
  {
  alert("You clicked on an ad" );
  }

setInterval("checkCookie()", 10000);

So to recap. I want to limit the number of iterations that setInterval("checkCookie()", 10000); can make