Write less words and speak directly in code:
<html>
<body>
男性：<input type="radio" id="male" name="xxx"/>
<br />
女性：<input type="radio" id="female" name="xxx"/>
<br />
<button onClick="output()">test</button>
<script>
function output()
{
if(document.getElementById("male").checked)
{
alert("1");
}
if(document.getElementById("female").checked)
{
alert("2");
}
}
</script>
</body>
</html>Done.
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