<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>單選按鈕，雙擊取消選中</title><script language="javascript" type="text/Javascript"> window.onload = function() { var radios = document.getElementsByTagName("input"); for (var i = 0; i < radios.length; i++) { if (radios[i].type == "radio") { radios[i].ondblclick = function() { this.checked = false; } } } } </script></head><body>A:<input type="radio" name="rad" value="0" />B:<input type="radio" name="rad" value="1" />C:<input type="radio" name="rad" value="2" />D:<input type="radio" name="rad" value="3" /></body></html>
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