how to keep dialog display?

[jy1989]

'buttons' : {
'Ok' : {
'action' : function () {
..........
}

when i click ok button, the dialog is close,
i try to return false for the function to keep the dialog, but it doesnt work.
so how should i keep it ?
thank you very much..

[vabatta]

You cannot.
I should implement this.

[jy1989]

yes, i use this dialog to do something input, and on the ok action i need to verify the field .. and keep the dialog show when verify is failed