gistfile1.js

/**
 * Creates a log wrapper for browser console. If console.log is defined, it passed the function arguments to it.
 * Using this method prevents problems when using console.log directly in IE (at least in version 8).
 */
var logger = function () {
    if (console && console.log) {
        console.log.call(console, arguments);
    }
}


// ...

// later invocation
logger.log("%o", "Hello JavaScript!");