Yes, I searched the web first. Damn Google keeps returning tens of thousands of pages where half my keywords are on pages that POINT to the returned page. :sigh:
What I want is:
1. User clicks button.
2. A Javascript function runs, preferrably synchronously.
3. The panel is displayed.
I have 1 and 3 working, but not 2. Specifically, I want to make sure that data in a list box on the page gets copied to a list box on the popup. I don't think an UpdatePanel would work, as the data exists as previous user input and not as external data.
If there is no "onShowing" event, how might I get this done?
Submit an article or tip