Dinamically Change Form on what user select as Action

[SignXi2]

Hi,

Let me take anr example to explain more clearly what I'm trying to achieve:

I have a table named  Logs that log every activities in a company. That table has others tables referencing to some  of its column. Basically when something happen in the company , an employee can log it, for example: "somebedy get hired in the company " or setting up a meeting... what I want is just one view with one dropdown menu and depending on what an employee choose in that menu, only informations related to that activity will be shown in a form to fill (a sort of dynamic form based on what is choosed).

if the employee select for example "Set ut a meeting" in the dropdown menu, a form in the same view will appear with for example "the date, the hour, the meeting location, the name of the person to meet". if the employee select another activity for example, send a mail the form will change to: "the message, the receiver email and the object"

Hope you understand now. I try my best to be clear as I can...

Thanks