Question

code as below:

    function(){
        log1();
        function log1(evt) {
            alert("1");
        }
    }();

on firefox 8, nothing happend,
and error log1 is not defined shown in firebug console.
The code could be executed succeeded on Chrome and IE9.

Answer 1

Your function can not be executed.
you can make it like this way:

(function(){
    log1();
    function log1(evt) {
        alert("1");
    }
})();