... 
myReplaceButton = add('button', undefined, "Ja", {name:'ok'}); 
myReplaceButton.shortcutKey = "j"; 
myReplaceButton.onClick = function(){ myUI.close(1); }; 
myReplaceButton.onShortcutKey = function(){ myUI.close(1); }; 
myReplaceButton.active = true; 
mySearchButton = add('button', undefined, "Nein"); 
mySearchButton.shortcutKey = "n"; 
mySearchButton.onClick = function(){ myUI.close(2) }; 
mySearchButton.onShortcutKey = function(){ myUI.close(2); }; 
...