title: best way to build dyanmic pop up menus
body: <p>I have a scheduling page that display a week (sunday to saturday) schedule.</p>
  
  <p>They way I want to add employees to this schedule is with a series of popup menus that change based on the values selected.</p>
  
  <p>For example the first menu will be Jobs with <code>&lt;option&gt;</code> values propagated from the jobs table in my db.</p>
  
  <p>Now say a user selects 'Cook' in the Jobs popup menu. The next menu 'Employees' will show all the employees from the employees table that have the job code of 'cook' set. Thus showing me all the cooks that would be available that day.</p>
  
  <p>What is the best way to make a series of menus like this?</p>
  
  <p>Any links to quality tutorials would be appreciated.</p>