Pop Up Window on Timer

How can you have a pop up open 10 seconds after the user opens a web page?

Code:

---

<script>
function windowPop(){
  window.open("popup.html","","");
}

setTimeout("windowPop()",10000);
</script>

---

that should do it!
the 10000 is milliseconds.
1 second = 1000 milliseconds
1/10 second = 100 milliseconds .......

:)

Thank you, works great1