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// COPYRIGHT © S.Westenskow 1997-2000 e-mail: XSSpl@hotmail.com ***
function sealedByvB() {
	var Qts = document.forms[0].elements[0].value
	var Vas = document.forms[0].elements[1].value
	var Fs  = document.forms[0].elements[2].value
	var Vb  = document.forms[0].elements[3].value
	var al  = Math.round((Vas/Vb)*1000000000)/1000000000
	var Fc  = Math.round((Math.sqrt(al + 1) * Fs)*100000000)/100000000
	var Qtc = Math.round(((Fc * Qts)/Fs)*100000000)/100000000
	var b   = Math.round(((1/Math.pow(Qtc, 2))-2)*1000000000)/1000000000
	var x1  = (Math.round((Math.pow(b, 2))*100000000000)/100000000000)
	var xa  = (Math.round((Math.sqrt(x1 + 4))*100000000000)/100000000000)
	var F3  = (Math.pow(((b + xa)/2), 0.5)) * Fc
valueQtc = Math.round((Qtc)*10000)/10000
valueFc = Math.round((Fc)*100)/100
valueF3 = Math.round((F3)*100)/100
document.forms[0].elements[4].value=valueQtc
document.forms[0].elements[5].value=valueFc
document.forms[0].elements[6].value=valueF3
}
// -->