<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div>1.下类不算编程的是?<div>
<lable for="h">A、html</lable>
<input type="radio" id="h" name="title" value="a" /><br />
<lable for="c">B、c语言</lable>
<input type="radio" id="c" name="title" value="b" /><br />
<lable for="j">C、javascript</lable>
<input type="radio" id="j" name="title" value="c" /><br />
<lable for="p">D、php</lable>
<input type="radio" id="p" name="title" value="d" />
<p><input type="button" onclick="myFunction()" style="background:green;color:white;-webkit-border-radius:5px;pading:2px 4px;" value="提交" /></p>
<script>
function myFunction(){
//定义答案
var val = "a";
//获取元素(为数组形式)
var radio = document.getElementsByName('title');
//判断表单是否有没选择
var obj = 0; //定义一个空值
for(var i = 0; i < radio.length; i++){
//全部循环获取表单判断是否有选中
if(radio[i].checked){
//选择则改变obj的值
obj = obj+1;
}
}
//判断obj的值不等于0的时候
if(obj != 0){
for(var i = 0; i < radio.length; i++){
//判断选中的表单
if(radio[i].checked == true){
//判断值是否与答案 val 相同
if(radio[i].value == val){
alert("答对了");
}else{
alert("答错了");
}
}
}
}else{
alert("请选择一个答案！");
}
}
</script>
</body>
</html>
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