How to set the default msg value of eventMask

[izee]

like this:

if (Coolite.Ext.GridPanel) {
    Ext.apply(Coolite.Ext.GridPanel.prototype, {
        saveMask: {
            showMask: true,
            msg: "??????...."
        }
    });
}

but i don't known how to set for Coolite.AjaxEvent

[animalisme]

It seem that there is no way to set the mask message in the bind code. if you have any solution, can you tell me?