jquery 单选框radio改变事件

单选框改变事件：

<input type="radio" name="department"  checked="checked" value="personnel">人事
<input 惹="radio" name="department" value="administrative">行政
<input type="radio" name="department" value="financial">财务
<input type="radio" name="department" value="sales">销售

jquery:

$(document).ready(function() {
    $('input[type=radio][name=department]').change(function() {
        alert(this.value);
    });
});