get multiple form fields

[hoju312]

I'm building a form that has 3 drop downs, I want the selections in the first 2 to determine the options in the 3rd. I've done similar ones where the first determined the 2nd which determined the 3rd, but I have no idea how to do this one.

[Fotiman]

The first 2 would have an onchange event handler that called your function for defining the 3rd options. For example:

function setSelectOptions() 
{ 
  // Get the selection from the first select box 
  var s1 = <get your selected value here>; 
  // Get the selection from the second select box 
  var s2 = <get your selected value here>; 
  if( s1 == 'a' && s2 == 'z' ) 
  { 
   // Set select box 3 options to some set 
   // ... 
  } 
  else if( s1 == 'a' && s2 == 'y' ) 
  { 
   // Set select box 3 options to this set 
   // ... 
  } 
  else if( s1 == 'b' && s2 == 'z' ) 
  { 
   // Set select box 3 options to this set 
   // ... 
  } 
  else if( s1 == 'b' && s2 == 'y' ) 
  { 
   // Set select box 3 options to this set 
   // ... 
  } 
  // Etc. 
} 

Hope that helps.