一、竖屏转横屏问题

<!-- uc强制竖屏 -->
<meta name="screen-orientation" content="portrait">
<!-- QQ强制竖屏 -->
<meta name="x5-orientation" content="portrait">
<!-- UC强制全屏 -->
<meta name="full-screen" content="yes">
<!-- QQ强制全屏 -->
<meta name="x5-fullscreen" content="true">
<!-- UC应用模式 -->
<meta name="browsermode" content="application">
<!-- QQ应用模式 -->
<meta name="x5-page-mode" content="app">
<!-- windows phone 点击无高光 -->
<meta name="msapplication-tap-highlight" content="no">
<!-- 适应移动端end -->

二、监听屏幕旋转

4. 屏幕旋转事件：onorientationchange

添加屏幕旋转事件侦听，可随时发现屏幕旋转状态（左旋、右旋还是没旋）。例子：

// 判断屏幕是否旋转

function orientationChange() {

    switch(window.orientation) {

    　　case 0: 

            alert("肖像模式 0,screen-width: " + screen.width + "; screen-height:" + screen.height);

            break;

    　　case -90: 

            alert("左旋 -90,screen-width: " + screen.width + "; screen-height:" + screen.height);

            break;

    　　case 90:   

            alert("右旋 90,screen-width: " + screen.width + "; screen-height:" + screen.height);

            break;

    　　case 180:   

        　　alert("风景模式 180,screen-width: " + screen.width + "; screen-height:" + screen.height);

        　　break;

    };<br>};

// 添加事件监听

addEventListener('load', function(){

    orientationChange();

    window.onorientationchange = orientationChange;

});