改变元素的html值，alert值改变了 ，但是页面上不变。源码在附件里面。

{{{
<header class="mui-bar mui-bar-nav">
<a class="mui-action-back mui-icon mui-icon-left-nav mui-pull-left"></a>
<a class="mui-action-menu mui-icon mui-icon-gear mui-pull-right" id="popbtn"></a>
<h1 class="mui-title" id="h_title">谁的空间</h1>
</header>
<nav class="mui-bar mui-bar-tab">
<a class="mui-tab-item">
<span class="mui-icon mui-icon-chatbubble"></span> 聊天
</a>
<a class="mui-tab-item">
<span class="mui-icon mui-icon-personadd" style="line-height: 20px;"></span> 关注
</a>
</nav>
<div class="mui-content">

        <div id="popover" class="mui-popover">  
            <ul class="mui-table-view">  
                <li class="mui-table-view-cell"><a href="#">拉黑</a>  
                </li>  
                <li class="mui-table-view-cell"><a href="#">打招呼</a>  
                </li>  
                <li class="mui-table-view-cell"><a href="#">送礼物</a>  
                </li>  

            </ul>  
        </div>  
        <div id="slider" class="mui-slider">  
            <div class="mui-slider-group ">  
                <div class="mui-slider-item mui-slider-item-duplicate">  
                    <a href="#">  
                        <img src="../images/user_detail.jpg">  
                    </a>  
                    <button id="renqibtn" class="mui-btn mui-btn-positive user_detail_renqi">人气 <span class="mui-badge mui-badge-positive">1</span>  
                    </button>  

                    <img src="../images/1.jpg" style="position: absolute;bottom: 0px;left: 20px;width: 80px;height: 80px;border-radius: 40px; z-index:999 ;" />  
                </div>  
            </div>  
        </div>  
        <div style="padding: 10px 10px;">  
            <div id="segmentedControl" class="mui-segmented-control">  
                <a class="mui-control-item mui-active" href="#item1mobile">  
                    基本资料  
                </a>  
                <a class="mui-control-item" href="#item2mobile">  
                    详细资料  
                </a>  
                <a class="mui-control-item" href="#item3mobile">  
                    个人相册  
                </a>  
                <a class="mui-control-item" href="#item3mobile">  
                    心情日记  
                </a>  

            </div>  
        </div>  
        <div id="popover" class="mui-popover">  
            <ul class="mui-table-view">  
                <li class="mui-table-view-cell"><a href="#">加入黑名单</a>  
                </li>  
                <li class="mui-table-view-cell"><a href="#">给他写信</a>  
                </li>  
                <li class="mui-table-view-cell"><a href="#">Item3</a>  
                </li>  
                <li class="mui-table-view-cell"><a href="#">Item4</a>  
                </li>  

            </ul>  
        </div>  
        <div class="mui-card">  
            <ul class="mui-table-view" id="zd_ul">  

                <li class="mui-table-view-cell mui-collapse"><a class="mui-navigate-right" href="#"><span class="mui-icon mui-icon-forward"></span>内心独白</a>  
                    <div class="mui-collapse-content" id="con_1">  

                    </div>  
                </li>  
                <li class="mui-table-view-cell mui-collapse"><a class="mui-navigate-right" href="#"><span class="mui-icon mui-icon-forward"></span>择友标准</a>  
                    <div class="mui-collapse-content">  

                    </div>  
                </li>  
                <li class="mui-table-view-cell mui-collapse"><a class="mui-navigate-right" href="#"><span class="mui-icon mui-icon-forward"></span>联系方式</a>  
                    <div class="mui-collapse-content">  

                    </div>  
                </li>  
            </ul>  

        </div>  

    </div>  
</body>  
<script type="text/javascript">  
    var flag = false;  
    var userid =null;  
     //获取从上个页面获取过来的参数  
    window.addEventListener('testId', function(event) {  
            // Wait = plus.nativeUI.showWaiting("新闻加载中");  
            userid = event.detail.id;  
            alert(userid);  
            var url = serverURL+'/user_detail.php?id='+userid;  
            var xhr = new plus.net.XMLHttpRequest();  
            xhr.onreadystatechange = function() {  
                switch (xhr.readyState) {  
                    case 4:  
                        if (xhr.status == 200) {  
                            var jsondata = eval('(' + xhr.responseText + ')');  
                            var carList = '';     

                            carList += '<h1>'+jsondata[0].monolog+'</h1>';  

                            document.getElementById('con_1').innerHTML='<h1>kk</h1>';  

                        } else {  
                            alert("xhr请求失败：" + xhr.readyState);  
                        }  
                        break;  

                }  
            }  
            xhr.open("GET", url);  
            xhr.send();  

    });  
    document.getElementById('renqibtn').addEventListener('tap', function() {  
        var parent = document.getElementById('renqibtn');  
        parent.className = parent.className + " turnon90";  

    }, false);  
    document.getElementById('popbtn').addEventListener('tap', function() {  
        if (!flag) {  
            mui('#popover').popover('show', {  
                left: 100,  
                right: 200  
            });  
        } else {  
            mui('#popover').popover('toggle');  
        }  

        //$('#popover').popover('toggle');//也可以直接调用toggle。该方法自动识别是显示还是隐藏  
    }, false);  
    /**  
     * 改变折叠菜单的样式  
     */  
    mui('#zd_ul').on('tap','li',function(){  
        var ul= document.getElementById('zd_ul');  
        var chil=ul.children;             
        for (var i=0;i<chil.length;i++) {  
            chil[i].children[0].children[0].className='mui-icon mui-icon-forward';  
        }  
        var span = this.children[0].children[0];  
        span.className='mui-icon mui-icon-arrowdown';  

    });  
    /**  
     * 加载数据  
     */  

    mui.plusReady(function(){  

    });  
</script>  

}}}