This is my first experience with javascript, and... Well... Ugh. Here's what's happening:

function step_1(id) {
    //blah blah
    step_2(id);
}
function step_2(id) {
    //blah blah
    step_3(id);
}
function step_3(id) {
    //blah blah
    alert(id);
}

step_1(0); // I can stick any number here, same thing happens...

The alert pops up and says "Undefined". But, if I throw an alert(id); in step_2, then both alerts say "0".

Why/how is id undefined? What am I doing wrong?

I've even tried reassigning id in each function, like:

var nid = id;
step_2(nid);

etc... But that still doesn't work without the alerts.