When I click an item second time, not able to bring the jQuery Dialog to the front if it is already opened in background

When I click an item second time, not able to bring the jQuery Dialog to the front if it is already opened in background

Hi,
I am opening a jQuery Dialog (with dialogExtendOptions) when click an item in a table.if I click the same item it is opening similar new dialog every time.I don't want to open dialog second time.Since it is already opened,I want to bring the already opened dialog to the front.

Please help on this same.

Thanks,
Karim