javascript判断是移动端还是pc端
//是移动端返回true,否则false
function isMobile() {
return (/phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone|webOS|android/i.test(navigator.userAgent))
}