Hide and show some custom fields
i just want to know if it is possible to show/hide some custom fields on the "Post form" depending on what the User has selected on the previous field. For example: there are 4 custom fields C1, C2, C3 and C4. The custom field C1 has the dropdown values "0" and "1". What i need is that, when the value "0" is selected in C1, then only the custom fields C2 and C3 should be shown on the post form. When "1" is selected in C1, then, only "C4" should be visible on the post form. Some ideas how to do that?
Thanks in advance