function calc_points(form) {

fib=form.fiber.value;
if (fib>4) {
  fib=4
}

tmp=(form.cals.value-10*fib)/50 + form.fat.value/12;
if ( Math.floor(tmp+.75) == Math.floor(tmp+1)) 
{
	if (Math.floor(tmp+.25) == Math.floor(tmp+1)) 
	{
		form.points.value = Math.floor(tmp+1);
	} 
	else 
	{
		form.points.value = Math.floor(tmp)+.5;
	}
		} 
		else 
		{
			form.points.value = Math.floor(tmp);
		}
		return false;
}