jQuery.fn.popupready = function(onready, url, name, features, replace) {
    var popup = window.open(url, name, features, replace);
    if (onready) {
        setTimeout(poll, 10);
    }
    function poll() {
        if (jQuery("body *", popup.document).length == 0) {
            setTimeout(poll, 10);
        }
        else {
            onready(popup);
        }
    }
    return popup;
};
jQuery.popupready = jQuery.fn.popupready;