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function calc (form) {
var T, S, Test, StandDev, PercRegress, Zscore, PE
Test=form.Test.options[form.Test.selectedIndex].value
S=form.Sex.options[form.Sex.selectedIndex].value
T=form.Minutes.value*1+form.Seconds.value/60
  if (S == "Male" && Test == "Bruce") {
     form.VOMax.value =
     14.76-1.379*T+0.451*Math.pow(T,2)-0.012*Math.pow(T,3)
}
  if (S == "Female" && Test == "Bruce") {
     form.VOMax.value =
     4.38*T-3.9
}
  if (S == "Male" && Test == "Balke") {
     form.VOMax.value =
     1.444*T+14.99
}
  if (S == "Female" && Test == "Balke") {
     form.VOMax.value =
     1.38*T+5.22
}
form.METs.value = form.VOMax.value/3.5
  if (S == "Male") {
     form.PopulationAverage.value =
     51.86-0.28*form.Age.value
}
  if (S == "Female") {
     form.PopulationAverage.value =
     41.435-0.23*form.Age.value
}
  if (S == "Male") {
     StandDev ="6"
}
  if (S == "Female") {
     StandDev ="5.5"
}
Zscore = (form.VOMax.value-form.PopulationAverage.value)/StandDev
PE= Math.exp(-1.8355027*(Math.abs(Zscore)-0.23073201))
PercRegress= -0.41682992*(PE-1)/(PE+1)+0.58953708
  if (Zscore > 0) {
     form.Score.value =
     Math.round(PercRegress*100)
}
  if (Zscore <= 0) {
     form.Score.value =
     Math.round((1-PercRegress)*100)
}
  if (Zscore >= 1) {
     form.Rating.value ="Excellent"
}
  if (Zscore < 1 && Zscore >= 0.5) {
     form.Rating.value ="Good"
}
  if (Zscore < 0.5 && Zscore >= -0.5) {
     form.Rating.value ="Average"
}
  if (Zscore < -0.5 && Zscore >= -1) {
     form.Rating.value ="Fair"
}
  if (Zscore < -1) {
     form.Rating.value ="Poor"
}
}
//-->?