// JavaScript Document
<!-- Hide script from old browsers //

function computeField(input)
{
  if (input.value != null && input.value.length != 0)
      input.value = "" + eval(input.value);
  computeForm(input.form);
}
function computeField2(input)
{
    if (input.value != null && input.value.length != 0)
        input.value = "" + eval(input.value);
    computeForm2(input.form);
}
function computeForm(form)
{
//The formula is: hp = (weight / 0.45359237) * (speed / 234)3 
//The Formula is: ET = hp/weight * 197
	
        var a = form.weight.value;
	var b = form.trap.value;
	var c =	b / 234;	
	var d = c * c;
	var e = d * c;
	var f = a * e;

    form.hp.value = f
}

function computeForm2(form)
{
	var a = form.weight2.value;
	var b = form.trap2.value;

	var c = (a / 0.45359237) / b;
	var d = Math.pow(c,1/3);
	var e = d * 5.825;
	form.hp2.value = e; 
	
	var f = b / (a / 0.45359237);
	var g = Math.pow(f,1/3);
	var h = g * 234;
	form.trap3.value = h;

}

// End script hiding from old browsers -->