判断设备

<script type="text/javascript">
     function detectmob() {
                if( navigator.userAgent.match(/webOS/i)
                || navigator.userAgent.match(/iPad/i)
                || navigator.userAgent.match(/iPod/i)
                || navigator.userAgent.match(/BlackBerry/i)
                || navigator.userAgent.match(/Windows Phone/i)
                ){
                    return true;
                    $("#changeStyle").attr("href","css/gameIndexPad.css");//替换css
                    document.body.addEventListener('touchmove', function (e) {
                      e.preventDefault(); //阻止默认的处理方式(阻止下拉滑动的效果)
                    }, {passive: false}); //passive 参数不能省略，用来兼容ios和android
                }
                else if(navigator.userAgent.match(/Android/i)
                ||navigator.userAgent.match(/iPhone/i)
                ){
                    return false;
                    
                }
            }
            //alert(detectmob())
            detectmob()
</script>