global javascript error handling

Question

Is there any way to catch Javascript errors globally across the web application by writing some code in the master page?

Answer 1

You can use the onerror event:

var oldOnError = window.onerror;
window.onerror = function()
{
    alert('Something bad happened');

    //Optionally...
    oldOnError();
}

Answer 2

See JavaScript Exception Handling Techniques