<form name="auth_form" action="auth.php">
<input name="gender" type="radio" value="<?php echo $gender_id; ?>"><?php echo $gender; ?>
</form>

<form name="auth_form" action="auth.php" method="post" onsubmit="return aa()">
<input name="payment" type="radio" value="123"/>
<input name="sea" type="radio" value="456"/>
}
<br />
<input type="submit" value="submit" />
</form>

<script>
function aa(){
    var radioInput=document.getElementsByTagName("form")[0].getElementsByTagName("input");
    if(radioInput[0].checked==false || radioInput[1].checked==false){
        alert("请选择。。");
        return false;
    }
}
</script>

------解决方案--------------------
探讨


radio的名字是变动的，不一定是payment
引用:

<form name="auth_form" action="auth.php" onsubmit="return foo();" >
JScript code
function foo(){
var count=0;
var payments=document.getElementsByName('pa……