[JoshTriplett]

Ideally you could specify an HTML element to place the notification near, and then pass whatever element the user activated to trigger the notification. Or you could specify target coordinates, and compute the desired location yourself. Both of those ought to use optional parameters, though; defaulting to center seems reasonable.

[lowboy]

If you look on the demo page (http://fabien-d.github.com/alertify.js/), all of the alerts get injected into #alertifylogs.alertify-logs which is positioned by css and therefore should be easy to overwrite:

    .alertify-logs {
        position: fixed;
        z-index: 5000;
        bottom: 10px;
        right: 10px;
        width: 300px;
    }