Firefox freezes if I change my system clock

[daniel2335]

When running the simplest javascript in firefox I get a freeze if I change my system clock.
Not sure if this is a javascript problem with setInterval call or a firefox problem.

The code I used was:

<html>
<head>
<script type="text/javascript">
   setInterval('test1()', 500);
   var inc = 0;
   function test1()
   {
      inc += 1;
      document.getElementById('id1').innerHTML = inc;
   }
</script>
</head>
<body id="id1">
</body>
</html>

If you run that in firefox so that its incrementing then change your system clock up and down by an hour it should freeze.
Can anyone make sence of this?

Thanks

[daniel2335]

Well to answer my own question.. I thought maybe it was to do with the setInterval so I changed my search. Managed to find an article with people suggesting the use of setTimeout of setInterval. Seems to have worked.