mui.openWindow不执行

    function exitSystem(){  
        if( !confirm("是否退出登陆？") ){  
            return;  
        }  
        $.ajax({  
            url: '/exitSystem.do?method=app',  
            type: 'post',  
            dataType: 'text',  
            async: false,  
            success: function (response) {  
                    mui.toast(response + "------------------");  
                if(response == "success"){  
                    try{  
                        mui.openWindow({  
                            id: 'loginxxxx',  
                            url: 'login.jsp'  
                        });  
                    }catch(e){  
                        alert(e);  
                    }  
                }else{  
                    alert("xxxx");  
                }  
            }  
        });  
    }  

<button class="mui-btn mui-btn-blue mui-btn-link mui-pull-right" onclick="exitSystem()">注销</button>