function compute(data)
{
   var f = document.Conversions;
   f.output.value = "*"

   var input = 0;
   var output = 0;
   var ucf = 1

  if (data=="noexample")
   {
     input = Input(f.input.value)
     output = Input(f.output.value)
   }
 if (data=="example")
     {
       input = 0.025;
       f.input.value = input;
       f.unit1.selectedIndex = 0;
       f.unit2.selectedIndex = 0;
     }
 if (data=="clear") {clearAll(f); return;}


  //get unit selections
   var unitin = f.unit1.options[f.unit1.selectedIndex].value
   var unitout = f.unit2.options[f.unit2.selectedIndex].value

  //convert units
  ucf = UnitKs(unitin,unitout)

  output = input*ucf
  f.output.value=Num2String(output,3,-15,15,-5,5); 
}
<!-- end conductivity_1.js -->