JavaScript：單選鈕的事件處理
阿新 • • 發佈：2019-01-06
<!doctype html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta name="description" content="all kinds of input">
<meta name="keywords" content="input,html">
<title>單選鈕的測試</title>
<script type="text/javascript">
window.onload = function () {
document.getElementById('showBtn').addEventListener('click',function() {
var sexArr = document.all('sex');
if (sexArr[0].checked) {
alert("性別是：" + sexArr[0].value);
}else{
alert("性別是：" + sexArr[1].value);
}
},false);
}
</script>
</head>
<body>
<form action="">
性別：<input type="radio" name="sex" id="sex" value="male - 男" checked="yes">男
<input type="radio" name="sex" id="sex" value="female - 女">女<br/>
<input type="button" id="showBtn" value="選擇"></input>
</form>
</body>
</html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta name="description" content="all kinds of input">
<meta name="keywords" content="input,html">
<title>單選鈕的測試</title>
<script type="text/javascript">
window.onload = function () {
document.getElementById('showBtn').addEventListener('click',function() {
var sexArr = document.all('sex');
if (sexArr[0].checked) {
alert("性別是：" + sexArr[0].value);
}else{
alert("性別是：" + sexArr[1].value);
}
},false);
}
</script>
</head>
<body>
<form action="">
性別：<input type="radio" name="sex" id="sex" value="male - 男" checked="yes">男
<input type="radio" name="sex" id="sex" value="female - 女">女<br/>
<input type="button" id="showBtn" value="選擇"></input>
</form>
</body>
</html>