I think if you search DO for multi-step forms you will find lots of answers.

Nancy

Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.

From: jayak kumar

i have created a mulitple listbox using '#type' => 'select'.

i have some buttons 'add', 'delete', 'clear'. when i click 'add' button i want to add some text in listbox as many as i want. if i click 'delete' i want to remove the items one by one. And if i click 'clear' the listbox should be empty.

can you please help me to solve this problem.