javascript判断手机旋转横屏竖屏

// 横屏竖屏函数
function orientationChange(){
    switch(window.orientation) {
        case 0: // Portrait
        case 180: // Upside-down Portrait
        //Javascript to setup Portrait view
        window.location.reload();       
        break;
        case -90: // Landscape: turned 90 degrees counter-clockwise
        case 90: // Landscape: turned 90 degrees clockwise
        //Javascript to steup Landscape view
        window.location.reload();       
        break;
    }
}
 window.addEventListener("onorientationchange" in window ? "orientationchange" : "resize", orientationChange, false); // 横屏竖屏时间