使用iPhone / iPod touch浏览我的网站时，单击菜单栏项会导致它们“抽搐”。为什么？

I cannot figure out why this is. The issue does not appear on Android devices that I've tested, yet with an iPhone or iPod touch, clicking on the menu-bar will cause it to twitch in and out of various sizes.I cannot figure out why this is. The issue does