[html5] Waiting for an object to be defined in javascript

[Larry Martell]

I need to do the equivalent of this in javascript:

while (typeof someObject == 'undefined') {
     sleep(10);  // 10ms
}

And I just can't quite figure out how to code this.

I have this:


function sleep(ms, callback, arg) {
    setTimeout(function() {
        callback(arg);
    }, ms);
}

function waitForDef(elem) {
    if (typeof elem == 'undefined') {
        sleep(10, waitForDef, elem)
    }
}

But it's not clear to me how to use this from my code.