Magento: event observer with save before and save after

Here I am going show how to create a simple product attribute programatically.I have created a simple script which is creating the product attribute when I do install my module or upgrade my module.So please look at the below code which I have created.

Magento : Different Form Fields In Admin Form Part One

In this article I am going to show how to add different form fields that you can use in admin forms
e.g : text,button,radio..etc.
app/code/local/MyNamespace/MyModule/Block/Adminhtml/Mymodule/Edit/Tab/Form.php