基于bootstrap的模态框的comfirm弹窗

        <button id="btn">点击弹出弹框</button>
        <!-- 弹出框 -->
        <div class="modal fade" id="confirm_like" tabindex="-1">
            <!-- 窗口声明 -->
            <div class="modal-dialog modal-sm">
                <!-- 内容声明 -->
                <div class="modal-content">
                    <div class="modal-header" style="padding-top: 10px; padding-bottom: 10px;">
                        <button class="close" data-dismiss="modal">
                            <span>&times;</span>
                        </button>
                        <h4 class="modal-title" id="myModalLabel"></h4>
                    </div>
                    <div class="modal-body">
                        <div id="modal_con" style="text-align: center;"></div>
                        <div id="firstDiv"></div>
                    </div>
                    <div class="modal-footer" style="text-align: center; padding-top: 10px; padding-bottom: 10px;margin-top:0;">
                        <button class="btn btn-sm btn-success" data-dismiss="modal" id="ok_btn">确 定</button>
                        <button class="btn btn-sm btn-success" data-dismiss="modal" id="cancel_btn">取 消</button>
                    </div>
                </div>
            </div>
        </div>

    $("#btn").click(function(){
        //调用
        show_confirm('提示', '数据提交中',certain,cancel);
    });
    //显示弹窗函数
    function show_confirm(title, msg ,ok_callback,cancel_callback) {
        $("#isConfirm").val('false');
        $("#myModalLabel").text(title);//这里设置弹窗的标头
        $("#modal_con").text(msg);//设置提示的信息
        $("#confirm_like").modal({//显示弹窗
            show : true,
            //backdrop : true,去掉遮罩层
        });
        //确定按钮事件函数
        $("#ok_btn").click(function(){
            if($.isFunction(ok_callback)){
                $('#confirm_like').off('hidden.bs.modal');        //解绑事件，防止多次绑定
                $('#confirm_like').on('hidden.bs.modal', function(){ok_callback("这是确定");});        
            }
        });
        //取消按钮事件函数
        $("#cancel_btn").click(function(){
            if($.isFunction(cancel_callback)){
                $('#confirm_like').off('hidden.bs.modal');
                $('#confirm_like').on('hidden.bs.modal', function(){cancel_callback();});        
            }
        });
        //弹窗的关闭按钮事件函数
        $("#confirm_like .close").click(function(){
            if($.isFunction(cancel_callback)){
                $('#confirm_like').off('hidden.bs.modal');
                $('#confirm_like').on('hidden.bs.modal', function(){cancel_callback();});        
            }            
        });
    }
    function certain(str){
        alert(str);
    }
    function cancel(){
        alert("这是取消");
    }