获取用户选择新单选按钮之前选择的单选按钮的值 [英] Get the value of the radio button that was selected before the user selects a new one

问题描述

如果我有 3 个单选按钮，有没有办法通过 jQuery 找出在用户单击新单选按钮之前选择的单选按钮的值?

If I have 3 radio buttons, is there a way through jQuery of finding out the value of the one that was selected before the user clicks a new one?

<div id="radio-group">
    <input type="radio" id="radio-1" name="radios" value="1" checked="true" />
    <input type="radio" id="radio-2" name="radios" value="2" />
    <input type="radio" id="radio-3" name="radios" value="3" />
</div>

在上面的例子中，如果用户点击radio-3，我需要一种方法来获取1，这样我就可以对其进行一些格式化.谢谢.

In the example avove, if the user clicks on radio-3, I need a way to get 1, so that I can carry out some formattion to it. Thanks.

推荐答案

我会将按下的值保存到一个数组中并用它来编辑隐藏的值.

I would save the pressed values to an array and edit hidden value with that.

http://jsfiddle.net/BQDdJ/6/

HTML

<div id="radio-group">
    <input type="radio" id="radio-1" name="radios" value="1" checked="true" />
    <input type="radio" id="radio-2" name="radios" value="2" />
    <input type="radio" id="radio-3" name="radios" value="3" />
    <input type="hidden" id="radio-previous" name="radio-previous" />
</div>​

JavaScript

$(document).ready(function(){
    var clicks = new Array();
    clicks[0] = 1 //this should be the default value, if there is one

    $('input[name$="radios"]').change(function(){
       clicks.push($(this).val()) 
       $('#radio-previous').val(clicks[clicks.length-2])
    })
})

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