function calculate(form) {
	var i=0
	var Q = parseFloat(form.elements[i].value); i++
	var S0 = parseFloat(form.elements[i].value); i++
	var X0i = parseFloat(form.elements[i].value); i++
	var II = parseFloat(form.elements[i].value); i++
	var XT = parseFloat(form.elements[i].value); i++
	var SRT = parseFloat(form.elements[i].value); i++
	var k = parseFloat(form.elements[i].value); i++
	var Y = parseFloat(form.elements[i].value); i++
	var kd = parseFloat(form.elements[i].value); i++
	var Ks = parseFloat(form.elements[i].value); i++
	var fd = parseFloat(form.elements[i].value)
	
	var S = Ks*(1+kd*SRT)/(SRT*(Y*k-kd)-1)
	var HRT = SRT/XT*(Y*(S0-S)*(1+fd*kd*SRT)/(1+kd*SRT)+X0i)
	var PxTVSS = XT*HRT*Q/SRT
	var PxTTSS = (Q*Y*(S0-S)/(1+kd*SRT)/0.85+fd*kd*Y*Q*(S0-S)*SRT/(1+kd*SRT)/0.85+Q*X0i+Q*(II))
	var bsCODremoved = Q*(S0-S)
	var YobsVSS = PxTVSS/bsCODremoved
	var YobsTSS = PxTTSS/bsCODremoved

	outputForm.elements[0].value = YobsVSS.toFixed(2)
	outputForm.elements[1].value = YobsTSS.toFixed(2)
	
}

function setTypicalValues(form) {
	var i=0
	form.elements[i].value = 1000; i++
	form.elements[i].value = 192; i++
	form.elements[i].value = 30; i++
	form.elements[i].value = 10; i++
	form.elements[i].value = 2500; i++
	form.elements[i].value = 6; i++
	form.elements[i].value = 12.5; i++
	form.elements[i].value = 0.40; i++
	form.elements[i].value = 0.10; i++
	form.elements[i].value = 10; i++
	form.elements[i].value = 0.15
	
	calculate(form)
}