How to stop javascript notification from showing after clicking ok

Question

I want to show a warning if I have something in my Facebook inbox. I think this can be easily done with custom scripts ... this is what I have so far (thanks to the guys on the userscripts forums):

document.addEventListener("DOMNodeInserted", function() {
  var count;
  if ((count=parseInt(document.getElementById("fb_menu_inbox_unread_count").textContent)) > 0)
  alert("You have "+count+" new message"+(count==1 ? "" : "s")+".");
}, true);

This works fine, except that the message gets stuck in the loop after clicking OK and continues to appear. Is there a way to stop the message after clicking the "Warning" button?

Answer 1

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- :

document.addEventListener(
  "DOMNodeInserted", 
  function() { 
    var count = parseInt(document.getElementById("fb_menu_inbox_unread_count").textContent);
    if (count > 0 && count != lastCount) {
      alert("You have "+count+" new message"+(count==1 ? "" : "s")+"."); }, true);
    }
    lastCount = count;  // Remember count to avoid continuous alerts.

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Answer 2

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