Tab container on page load...

Dear readers,

Im Mahsh and my requirement is...  i want to display the Tab container with couple of panel..

In first panel, There must be a button control and when i click the button the panel must get displayed what is tab index... This is my requirement..

I tried this with Ajaxcontrol tool kit but it throws an error like ScriptManager control must be added before any control needs it display... Can anyone assit me...

Regards,

Mahesh