function bmiCalc(form) {
        var weight = Number(form.wt.value);
	var height = Number(form.ht.value);
	

        if (form.sex[1].checked) {      //  Is the patient female?
                                        //  0 = male
                                        //  1 = female
		leanConvert = 148;
		idealConvert = 45.5;	//  conversion factors for women
        } else {
		leanConvert = 128;
		idealConvert = 50;	//  conversion factors for men
	}

	heightInches= height / 2.54;
	heightMeters = height / 100;
	

	var bsa = 0.20247 * Math.pow(heightMeters,0.725) *
		Math.pow(weight,0.425);
	var leanKg = 1.1 * weight - leanConvert * (Math.pow(weight,2) / 
		Math.pow((100 * heightMeters),2));
	var leanLbs = leanKg * 2.2046226;
	var idealKg = idealConvert + 2.3 * (heightInches - 60);
	var idealLbs = idealKg * 2.2046226;
	var bmi = weight / Math.pow(heightMeters,2);

	bsa = rounding(bsa,2);
	leanKg = Math.round(leanKg);
	leanLbs = Math.round(leanLbs);
	idealKg = Math.round(idealKg);
	idealLbs = Math.round(idealLbs);
	bmi = rounding(bmi,1);

	if (bmi < 18.5) {
		var interp = "снижен"
	} else {
		if (bmi < 25.0) {
			var interp = "норма"
		} else {
			if (bmi < 30.0) {
				var interp = "увеличен"
			} else {
				var interp = "высокий"
			}
		}
	}

        form.bsa.value = bsa;
        form.idealKg.value = idealKg;
        form.bmi.value = bmi;
	form.interp.value = interp;

	return true
}

function rounding(number,decimal) {
	multiplier = Math.pow(10,decimal);
	number = Math.round(number * multiplier) / multiplier;
        return number
}