如何通过name获取value值?
<!DOCTYPE HTML>
<html>
<head>
<script type="text/javascript">
function word(){
alert(document.getElementsByName("in").value);
}
</script>
</head>
<body>
<input name="in" type="button" onclick="word()" value="111" />
<input name="in" type="button" onclick="word()" value="222" />
<input name="in" type="button" onclick="word()" value="333" />
</body>
</html>随意点击其中一个按钮,然后获取它的value值,如何才能做到啊?