Help with Drop down lists

[varun_146100]

Hi ,

 

Am a newbie to PHP and have been working with drop down lists.

I have a drop down list with 3 options.

Like i have 3 options available there i.e new/cancel/update.

Now i need to generate another 2-3 drop down lists after selection of either of these options above.

For example if i select update 3 different drop down lists should be generated on the screen.

How should i do this...Please help.