overriding a global function in javascript

Question

I am trying to add my own error handling to the JavaScript setTimeout function. The following code works fine in chrome:

var oldSetTimeout = window.setTimeout;
         


        

Answer 1

Minor improvement to the Answer of Tim Down to mimic the original even more:

window.oldSetTimeout = window.setTimeout;
window.setTimeout = function(func, delay) {
    return window.oldSetTimeout(function() {
        try {
            func();
        }
        catch (exception) {
            //Do Error Handling
        }
    }, delay);
};