HTML checkbox 获取选中的值

<div>
                                        <input type="checkbox"
                                               name="feedback_ids"
                                               value="数值asdasd"/>
                             

                                    </div>

var id = document.getElementsByName("feedback_ids")
                var value = new Array();
                for (var i = 0; i < id.length; i++) {
                    if (id[i].checked) {
                        value.push(id[i].value);
                    }
                }
                alert(value);