Javascript delaying

In need of executing Javascript after the page has loaded, or something else has been initialized I came up with a simple but useful tiny "Delayer":

/**
 * @param handler a callback accepting Delayer.dispatch as argument
 */
function Delayer(handler) {
    var self = this;

    this.dispatch = function() {
        for (var i = 0; i < self.length; ++i) {
            console.log("running delayed init "+i+": "+self[i]);
            self[i]();
        }
    };

    if (typeof handler == "function" || handler instanceof Function) {
        handler(this.dispatch);
    }
}

Delayer.prototype = Array.prototype;

It can be initialized the following way:

/* e.g. with jQuery */
window.delayedInits = new Delayer($(document).ready);
/* e.g. with Facebook */
window.fbDelayedInits = new Delayer(function(dp){window.fbAsyncInit = dp;});

Then you push your work the usual way:

delayedInits.push(function() {alert("Hello, delayed!");});