Display pop up form

Can you suggest me to display popup form (i.e. sub form) when selecting a particular option from drop down list?

Best way to do that is through Javascript code. Insert that sub-form into a hidden layer, when ‘option’ is selected then display the form. Make sure you check whether the value of the option is selected to process that form on the server side.

Thanks Antonio

Similar issue: I use CJuiDialog widget to display subform when a link ‘custom’ is clicked. This custom has it’s own parameters: o & io (eg : index.php?o=3&oi=6)

value for o and io which comes dynamically.

What I need in CJuiDialog is to pass that parameter dynamically.

Is there any twist?