手机用户扫描二维码：
长安可以弹出环形菜单。
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<title>游戏风格的jQuery右键环形菜单_何问起</title>
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<h1>鼠标右键一次打开菜单，再次右键关闭菜单，鼠标移出菜单后点击左键也可关闭菜单。</h1>
<h1>手机用户：长按=右键，点击=左键</h1>
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