I need your help folks and before hand my apologies for my weak english skills.
anyway I am designing an application with ajax accordion on .net 2.0 asp.net using vb.net. The accordion has three panels and I want the second and third panels to be opened once the one before has been filled, validate and submited except the first one. By default the first one is opened for the user to fill out. However users can open any panels by simply clicking the headers. I have tried to use jquery to disable the second and third panels when the page loads however I couldn't able to achieve that because I am getting "cannot call method 'get_pane' of null" error.
My second issue is once a panel is activated it changes the header CSS style however when I click around among the activated panels sometimes the activate panel change the header style to deactivated css. example if all of the three panels are activated and if I click around them to e ...

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