JavaScript global event mechanism

Question

I would like to catch every undefined function error thrown. Is there a global error handling facility in JavaScript? The use case is catching function calls from flash that

Answer 1

// display error messages for a page, but never more than 3 errors
window.onerror = function(msg, url, line) {
if (onerror.num++ < onerror.max) {
alert("ERROR: " + msg + "\n" + url + ":" + line);
return true;
}
}
onerror.max = 3;
onerror.num = 0;