<!-- Author: Brian Mackenzie -->
<!-- Date: 17th June 2007 -->
<!-- Version: 1.0 -->

function calculate()

{
  var t = document.stride.electric.options[document.stride.electric.selectedIndex].value;
  var e = document.stride.events.options[document.stride.events.selectedIndex].value;
  var r = document.stride.result.value;
  
  var a = [0,58.0150,20.5173,25.4347,5.74352,5.8425,1.53775,0.08713,0.03768,0.8465,0.14354,0.2797,51.39,10.14,12.91];
  var b = [0,11.5,15.5,18,28.5,38,82,305.5,480,75,220,100,1.5,7,4];
  var c = [0,1.81,1.92,1.81,1.92,1.81,1.81,1.85,1.85,1.42,1.4,1.35,1.05,1.08,1.1];
  
  d=e*1;

  if (d>8)
  {
  p=Math.floor(a[d]*Math.pow((r-b[d]),c[d]));
  }
  else
  {
	f=0;
	if (t=="No")
	{
	  if (d<6) f=0.24;
	  if (d==6) f=0.14;
	}
	p=Math.floor(a[d]*Math.pow((b[d]-f-r),c[d]));
  }
	
  document.stride.points.value = p;
} 

function vclear()
{
  document.stride.points.value = "";
  document.stride.result.value = "";
}

function symbol()
{
  var e = document.stride.events.options[document.stride.events.selectedIndex].value;
  d=e*1;
  m="secs";
  if (d>8) m="cm";
  if (d>11) m="m";
  document.stride.sym.value = m;
}