function calc (form) {
form.CFatWeight.value = form.CWeight.value*form.CPercentFat.value/100
form.CLeanWeight.value = form.CWeight.value-form.CFatWeight.value
form.TLeanWeight.value = (1*form.LeanWeightChange.value)+(1*form.CLeanWeight.value)
form.TWeight.value = form.TLeanWeight.value/((100-form.TPercentFat.value)/100)
form.TFatWeight.value = form.TWeight.value-form.TLeanWeight.value
}