Question

I have an external library that’s calling form.submit(). No matter what I do, I can’t seem to catch the event when it’s called directly like that.

Example: http://jsfiddle.net/cwolves/yXsWc/

Answer 1

Instead of intercepting the event, have you tried intercepting the submit() call itself? You could do something like replace the default submit() function with one of your choosing that only submits if some flag is set. For instance:

var formElem = document.getElementById("myForm");
formElem.oldSubmit = formElem.submit;
formElem.submit = function(myFlag) {
    if (myFlag) {
        document.getElementById("myForm").oldSubmit();
    }
};