<script language="javascript"> <!-- function CheckForm() { var flag = false; var allRadio = document.form.elements["miaoshu"]; for(var i = 0;i < allRadio.length;i++){ if(allRadio[i].checked){ alert(allRadio[i].value); flag = true; } } if (!flag){ alert("请选择") } return flag } --> </script> <form id="form" name="form" method="post" action="http://www.xuejiqiao.com/texiao/" onsubmit="return CheckForm()"> <input type="radio" value="3" name="miaoshu"><input type="radio" value="4" name="miaoshu"><input type="submit" value="提交"> </form>

(www.xuejiqiao.com)提示：可修改后再运行代码!