var activity=new Array();
var weight;
var minutes;

function HowMany(ActivityBurn) {
var burn;
var kilograms;
var weight_entered;
var minutes_entered;

burn_value=ActivityBurn.activity.options[ActivityBurn.activity.selectedIndex].value;
weight_entered=ActivityBurn.curweight.value;
minutes_entered=ActivityBurn.duration.value;

if (burn_value=="" || weight_entered=="" || minutes_entered=="") {
alert("Please enter all required data!");
}
else {

kilograms=curweight/2.2;
hours=duration/60.0;
burn=Math.round(burn_value*kilograms*hours);
 }

ActivityBurn.Fdiff.value = burn;
ActivityBurn.wkg.value = eval(kilograms);
}

function SetWeight(weight) {
curweight = weight.value;
}
function SetDuration(minutes) {
duration = minutes.value;
}

//metric
var mactivity=new Array();
var mweight;
var mminutes;

function MHowMany(MActivityBurn) {
var mburn;
var mkilograms;
var mpounds;
var mweight_entered;
var mminutes_entered;

mburn_value=MActivityBurn.mactivity.options[MActivityBurn.mactivity.selectedIndex].value;
mweight_entered=MActivityBurn.mcurweight.value;
mminutes_entered=MActivityBurn.mduration.value;

if (mburn_value=="" || mweight_entered=="" || mminutes_entered=="") {
alert("Please enter all required data!");
}
else {

mkilograms=mcurweight;
mpounds=mkilograms * 2.2;
mhours=mduration/60.0;
mburn=Math.round(mburn_value*mkilograms*mhours);
 }

MActivityBurn.MFdiff.value = mburn;
MActivityBurn.mpounds.value = eval(mpounds);
}

function MSetWeight(mweight) {
mcurweight = mweight.value;
}
function MSetDuration(mminutes) {
mduration = mminutes.value;
}


function calc_hr()
	{
		level = document.form1.level.value;
		val = 220-document.form1.age.value;
		if (document.form1.level[0].checked){
		val1 = val * .4;
		val2 = val * .5;
	}
		if (document.form1.level[1].checked){
		val1 = val * .5;
		val2 = val * .6;
	}

	if (document.form1.level[2].checked){
		val1 = val * .6;
		val2 = val * .8;
	}

	if (document.form1.level[3].checked){
	val1 = val * .7;
	val2 = val * .9;
	}

	document.form1.target1.value = Math.round(val1);
	document.form1.target2.value = Math.round(val2);
	}