sharepoint drop down list based on previous selection

It does work fine when I simply run the given example as-is. When a certain option in the first dropdown box is selected, I then want the second dropdown box to show. First thing you need to do is remove the spaces in the id's. How to make Twitter Bootstrap menu dropdown on hover rather than click. Why are the time zones calculated as 360°/24 and not 361°/24 or 360°/23.933? Here is the HTML I have right now: As I stated, neither of the javascript codes in the above examples are working for me, and I am quite new to javascript (and not overly experienced in HTML either) so any suggestions? Select a Job Title and three columns are then updated. What powers the air-conditioning on commercial planes? I'd use this same layout for everything that depends on which