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title: menubutton
---
# menubutton
在使用者按功能表按钮时，将触发该事件。
document.addEventListener("menubutton", yourCallbackFunction, false);
## 详细资讯
事件处理常式的应用覆盖的预设功能表按钮行为。
应用程式通常应使用 `document.addEventListener` 将一个事件拦截器附加一次 `[deviceready](events.deviceready.html)` 事件火灾。
## 支援的平台
* 亚马逊火 OS
* Android 系统
* 黑莓 10
## 快速的示例
document.addEventListener("menubutton", onMenuKeyDown, false);
function onMenuKeyDown() {
// Handle the back button
}
## 完整的示例
Menu Button Example