Javascript to determine the horizontal and vertical screen mode of iphone/android phones

Today, when we were dealing with the development of a touch-screen product, we were tortured by the horizontal and vertical screen modes. The iphone can use the onorientationchange event, but the android onresize event will be triggered multiple times even if it is not rotated. I checked a lot of information and concluded that function orientationChange () {switch (window. orientation) {case 0: // Portraitcase 180: // Upside-down Portrait // Javascript to setup Portrait viewbreak; case-90: // Landscape: turned 90 degrees counter-clockwisecase 90: // Landscape: turned 90 degrees clockwise // Javascript to steup Landscape viewbreak;} window. addEventListener ("onorientationchange" in window? "Orientationchange": "resize", orientationChange, false );