function orient() {
alert('gete');
if (window.orientation == 0 || window.orientation == 180) {
$("body").attr("class", "portrait");
orientation = 'portrait';
return false;
} else if (window.orientation == 90 || window.orientation == -90) {
$("body").attr("class", "landscape");
orientation = 'landscape';
return false;
}
} /* 在页面加载的时候调用 */
$(function () {
orient();
}); /* 在用户变化屏幕显示方向的时候调用*/
$(window).bind('orientationchange', function (e) {
orient();
});