function secondorder()
  {
  if((document.second.cratio.value <= 0) || (document.second.lratio.value <= 0) || (document.second.rh.value <= 0 ) || (document.second.rl.value <= 0 ) || (document.second.fc.value <= 0 ))
    {
    alert("Be sure to Select Crossover Type and Fill In High/Low Pass Impedence and Frequency Values!");
    }
  else
    {
    cratio = eval(document.second.cratio.value);
    lratio = eval(document.second.lratio.value);
    rl = eval(document.second.rl.value);
    rh = eval(document.second.rh.value);
    fc = eval(document.second.fc.value);
    document.second.c1.value = eval((cratio/(rh*fc))*1000000);
    document.second.l1.value = eval((lratio*rh/fc)*1000);
    document.second.c2.value = eval((cratio/(rl*fc))*1000000);
    document.second.l2.value = eval((lratio*rl/fc)*1000);
    }
  }
  function secondtype(typeRadio)
  {
  if (typeRadio == "1")
    {
    document.second.cratio.value = ".1125";
    document.second.lratio.value = ".2251";
    }
  else if (typeRadio == "2")
    {
    document.second.cratio.value = ".0796";
    document.second.lratio.value = ".3183";
    }
   else if (typeRadio == "3")
    {
    document.second.cratio.value = ".0912";
    document.second.lratio.value = ".2756";
    }
  }