Spawn/Delete Functionality to an App.Alert

I'm using a bit of complex code (and I'm trying to stay away from global variables) to have a checkbox within an app.alert window that upon click wound spawn a template. I have both codes (one for the app.alert with checkbox, and one for the spawn/delete) but cannot seem to link the two together well. Any help would be greatly appreciated.

App.Alert Code [Based on a dropdown value] :

{var oCk = {cMsg:"Yes, I want to add a form to this document", bInitialValue:true, bAfterValue:false};

    app.alert({cMsg:" Do you want to add a form to this document?", nIcon:3, oCheckbox:oCk, cTitle:"TDR?"});

    }

Spawn/Delete Code [To be triggered upon click of app.alert check]:

if (this.getField("Checkbox").value == "Off")

{

    oFld = this.getField("Additional NotesComments");

    this.deletePages(oFld.page[1]);

}

else

{

    var a = this.getTemplate("Form");

    a.spawn(1, false, false);

}

Let me know if you can help!