title: Visualforce page custom filter
body: <p>I have an Object, lets say 'Resources'
  Each object have type, lets say 'Contractors'
  Each 'Contractor' may have sub-types A, B, C, D</p>
  
  <p>I have visualforce page setup that outputs all 'Contractors' as a table, but I also want to have Sub-types dropdown with A, B, C, D values with option to filter Contractors (Lets say, I select 'A', page will be refreshed, and all contractors with sub-type A appear).</p>
  
  <p>Type and Sub-type are related list (Type is controlling field for sub-type)</p>
  
  <p>I would really appreciate for your help.</p>
  
  <p>Thank you.</p>