<!--
function solvehr() {
	var a,b,c,d,e

	a = document.heartrate
	b = a.age.value
	b = parseInt(b)
	c = 220-b
	d = Math.round(c*.65)
	e = Math.round(c*.85)

	document.heartrate.low.value = d
	document.heartrate.high.value = e
}
-->