Module development and code questions

I want to be able to prevent content from being accessible based on a date and time.

For instance I want to schedule a press release. I have a datestamp in my content and I can use a view to filter the content but what if someone figures out that they can access the content by the node path. ie: node/363.

If the date and time has not passed I want to deny uses from viewing this content.

http://drupal.org/project/chatblock

For the chatblock, how do you set it to automatically refresh once the Send button is hit? Also, how can I reduce the space between the chat lines?

Hi all. I have a problem that I'm betting has been addressed many times before, but I haven't found any discussion of it.

I'm creating a page with a search form at the top:

Hi Guys,

I am developing a new module that would use og's default form. The default form of the OG is being generated by og_form_alter($form_id, &$form), I think. But How can I use this in another modulule's form.

Thank You.
Crinch.

In my project, there are so many type of user, So i want to add a combo box like user type in top of form in user profile. I have installed profile module and i also added user type field but this field is coming in user profile at bottom location.

Please help me regard this.

HI Guys,