請問我如何用getElementsByName選取多個不同名稱的Name值去計算
範例：
<script>
function calculateMoney() {
var sum = 0;
var chkItems = document.getElementsByName("a1");
for (var i = 0; i < chkItems.length; i++) {
if (chkItems[i].checked) {
sum += parseInt(chkItems[i].value);
}
}
function iniEvent() {
var chkItems = document.getElementsByName("a1");
for (var i = 0; i < chkItems.length; i++) {
chkItems[i].onclick = calculateMoney;
}
}//金額總加AJAX
</script>
<input name="a1" type="checkbox" id="a1" value="30"/>
<input name="a2" type="checkbox" id="a2" value="60"/>
<input name="a3" type="checkbox" id="a3" value="90"/>
