<script type="text/javascript">
   var rr = false;
    function layer_confirm() {
        //询问框
        var index = layer.confirm(‘你确定要支付吗？支付后会在您的余额中扣除相应金额!‘,
            {
                btn: [‘确认‘, ‘取消‘] //按钮
            },
            function (index) {
                rr = true;
                __doPostBack(‘<%= btn_pay.UniqueID %>‘, ‘‘);
                layer.close(index);

            },
            function (index) {
                rr = false;
                layer.close(index);
            });
            return rr;
        }
</script>