关于php：radio只传递第一个值

radio is only passing the first value

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Possible Duplicate:
How can I get which radio is selected via jQuery?

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我试图在我的网站上放置一个用户评级系统，但只有第一个值被传递，所以在表中，评级列总是一个值。我用收音机已经有一段时间了。

这是我的东西。

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<form id="add-rateing">
<input type="radio" name="MOVIE_RATING" value="1"> 1
<input type="radio" name="MOVIE_RATING" value="2"> 2
<input type="radio" name="MOVIE_RATING" value="3" checked="yes"> 3
<input type="radio" name="MOVIE_RATING" value="4"> 4
<input type="radio" name="MOVIE_RATING" value="5"> 5
<input type="hidden" name="MOVIE_ID" value="<?php echo $id; ?>">
<input type="hidden" name="MOVIE_TITLE" value="<?php echo $title; ?>">
<input type="hidden" name="USER_ID" value="<?php echo $loggedinusername; ?>">
<input type="submit" value="I Drank To The Credits" onclick="$('#add-rateing').hide('fast')">
</form>
<script type="text/javascript">
$("#add-rateing").submit(function(event){
event.preventDefault()

addrateing();

});

function addrateing()
{
var movie_rating_s = $("#add-rateing [name='MOVIE_RATING']").val();
var movie_id_s = $("#add-rateing [name='MOVIE_ID']").val();
var movie_title_s = $("#add-rateing [name='MOVIE_TITLE']").val();
var user_id_s = $("#add-rateing [name='USER_ID']").val();
var errors = '';

$.ajax({
type :"POST",
url :"movie_watched.php",
data : { rating: movie_rating_s,
movie : movie_id_s,
title: movie_title_s,
user : user_id_s, },

cache : false, timeout: 10000,

success : function() {
alert("You have played <?php echo $title; ?>");

},
error : function() {
alert("there is a problom");
},
complete : function() {
}

});
};