<!-- Author: Brian Mackenzie -->
<!-- Date: 11th March 2004 -->
<!-- Version: 1.0 -->
<!-- Function:  Calculate the results from the Rowing step test -->
<!-- Required by: rowsteptest.htm -->
<!-- Copyright Brian Mackenzie 2004 -->

function calculate()
{
  var tm = document.stride.tmin.value;
  var ts = document.stride.tsec.value;
  var a = [264,205,177,159,147,138,129,124,119,114,110,107,104,101,99,96,94,92,90,89,87,86,84,83];

  tm = tm * 1;
  ts = ts * 1;

  if (ts>59)
    {
      ts=59;
      document.stride.tsec.value = 59;
    }
  document.stride.tsec.value = ts;

  tt = tm*60 + ts;
  tt = tt/4;

  for (var k = 0; a[k]>tt;k++);
  k=k-1;

  m1=Math.floor(a[k-6]/60);
  document.stride.m1.value = m1;
  document.stride.s1.value = a[k-6] -(m1*60);

  m2=Math.floor(a[k-5]/60);
  document.stride.m2.value = m2;
  document.stride.s2.value = a[k-5] -(m2*60);

  m3=Math.floor(a[k-4]/60);
  document.stride.m3.value = m3;
  document.stride.s3.value = a[k-4] -(m3*60);

  m4=Math.floor(a[k-3]/60);
  document.stride.m4.value = m4;
  document.stride.s4.value = a[k-3] -(m4*60);
  document.stride.m5.value = 'Max Effort';

}

function valclear()
{
  document.stride.m1.value = "";
  document.stride.s1.value = "";
  document.stride.s2.value = "";
  document.stride.m2.value = "";
  document.stride.s3.value = "";
  document.stride.m3.value = "";
  document.stride.s4.value = "";
  document.stride.m4.value = "";
  document.stride.m5.value = "";
}