Errors in author-generated event scripts may cause browser crash

Where a form contains script that is invoked by a formsPlayer event thus:

<script for="subX" event="xforms-submit">
callErroneousFunction();
</script>

and that script throws an uncaught exception, this may cause a browser crash in some environments.

In versions of formsPlayer and environments where this issue is present, the issue may be avoided by ensuring that such a script does not throw exceptions.