var alertFallback = false; // enable if you wanna see alerts msg
if (typeof console === "undefined" || typeof console.log === "undefined") {
    console = {};
    if (alertFallback) {
        console.log = function(msg) {
            alert(msg);
        };
    } else {
        console.log = function() {};
    }
}

http://stackoverflow.com/questions/690251/what-happened-to-console-log-in-ie8

Helps to manage console.log debug in js when broswing in IE. If alertFallback is enabled, you can see js alerts appears of vars tracked.

Manage console.log on IE

ie, log

JavaScript