WHMCS Configurable options jquery modification

Using WHMCS admin control panel I have created tow configurable drop down options The first drop down is to choose the operating systems The second one is choose control panel 1- The second drop down should only show the available control panel for each operating system and hide the once which aren’t available and show (no control panel) if there is no control panel for the chosen operating system. 2- The default selected option for the second drop down is (no control panel) and this should not show on the order summary You must have experienced with WHMCS not only jquery.