RTD Calculator

// javascript code that powers the above form, RTD curve 0.392

function Temperature()
{
   var temp = 0;
   var res = document.input.resistance.value;

   if((res < 60) || (res > 200))
   {
      alert("Input resistance out of range!\n\nMust be between 60 and 200 ohms.");
      return;
   }

   temp = (2.4161881 * res - 241.59828) / (1 - 0.00037773264 * res);

   if(document.input.celsius[1].checked)
   {
      temp = 1.8 * temp + 32;
   }

   temp = Math.round(temp * 100) / 100;
   alert("Temperature is " + temp);
}