function orient() { if (window.orientation == 90 || window.orientation == -90) { //ipad、iphone竖屏；Andriod横屏 $("body").attr("class", "landscape"); orientation = 'landscape'; return false; } else if (window.orientation == 0 || window.orientation == 180) { //ipad、iphone横屏；Andriod竖屏 $("body").attr("class", "portrait"); orientation = 'portrait'; return false; } } //页面加载时调用 $(function() { orient(); }); //用户变化屏幕方向时调用 $(window).bind('orientationchange', function(e) { orient(); });