组合框更改其他组合框的值

我的表单上有两个组合框。每个都有值 Yes 和 No。我想要的是当一个改变时另一个得到相反的结果（如果第一个是 Yes，另一个是 No）。我需要用 Javascript 来做。我看到这个问题如何使用 JavaScript 更改组合框中的“选定”值？ https://stackoverflow.com/questions/1778184/how-to-change-selected-value-in-combobox-using-javascript但它仅适用于一个组合框。

我怎样才能做到这一点？

LE：我需要用组合框制作这个示例。我无法使用单选按钮

我创建了一个简单的jsFiddle 演示 http://jsfiddle.net/pFuJQ/78/。这并不完美，只是说明了这个想法。

HTML:

<select id="first">
    <option value="0" selected>No</option>
    <option value="1">Yes</option>
</select>

<select id="second">
    <option value="0">No</option>
    <option value="1" selected>Yes</option>
</select>

JavaScript：

//find the selects in the DOM
var first = document.getElementById('first');
var second = document.getElementById('second');

//this is the handler function we will run when change event occurs
var handler = function () {
    //inside the handler, "this" should be the select 
    //whose change event we are currently handling

    //get the current value and invert it (0 -> 1, 1 -> 0)
    var invertedValue = this.value === '0' ? 1 : 0;

    //check which select's change we are currently handling
    //and set the inverted value as the other select's value
    if (this === first) {
        second.value = invertedValue;
    } else {
        first.value = invertedValue;
    }

};

//add handler function to run on change event on both selects
first.addEventListener('change', handler, false);
second.addEventListener('change', handler, false);