function show(eid) {
	document.getElementById(eid).style.visibility = 'visible';
 }

 function hide(eid) {
	document.getElementById(eid).style.visibility = 'hidden';
 }
 function NumRV()
 {
	var n = 0;
	var m = 0;
	for (i=0; i<32; i = i + 2) if (document.YorN.elements[i].checked) n = n+1;
	for (i=1; i<32; i = i + 2) if (document.YorN.elements[i].checked) m = m+1;
	if (n + m == 16) {
		alert("選択された「はい」は" + n + "個です");
		window.scrollBy(0, 300);
		if (n > 8) {
		location.href = "http://www.khf.or.jp/kenko/level1.html"
		} else if (n < 5) {
		location.href = "http://www.khf.or.jp/kenko/level3.html"
		} else {
		location.href = "http://www.khf.or.jp/kenko/level2.html"
		}

	 }
 }
 function CheckRV()
 {
	var n = 0;
	for (i=0; i<32; i = i + 2) if (!document.YorN.elements[i].checked && !document.YorN.elements[i+1].checked) n = i/2+1;
	if (n > 0) alert("項目" + n + "が選択されていません");
 }


function calc_bmi(f) {
    var bmi, my_height, my_weight;

    my_height = eval(f.height.value);
    my_weight = eval(f.weight.value);
    bmi = Math.round(eval(my_weight)/(my_height)/(my_height)*10000*10)/10;
    f.bmi.value = bmi;
    f.ave.value = Math.round(eval(my_height) * eval(my_height)*0.0022*10)/10
    if (bmi < 20) {
        f.result.value = "やせ"
    }
    else if (bmi < 24) {
        f.result.value = "正常"
    }
    else if (bmi < 26.5) {
        f.result.value = "やや肥満"
    }
    else {
        f.result.value = "肥満"
    }
}