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---
title: extra1
slug: Mozilla/Tech/XUL/Method/extra1
translation_of: Archive/Mozilla/XUL/Method/extra1
---
<div class="noinclude">
<span class="breadcrumbs XULRefMeth_breadcrumbs">« <a href="/en-US/docs/XUL_Reference" title="/en-US/docs/XUL_Reference">XUL Reference home</a></span></div>
<dl>
<dt>
<span id="m-extra1"><code><a href="https://developer.mozilla.org/zh-CN/docs/Mozilla/Tech/XUL/Method/extra1">extra1()</a></code></span></dt>
<dd>
返回值类型:无返回值</dd>
<dd>
调用该方法可以模拟对extra1按钮的点击,同时也会触发并执行该元素的<code id="a-onextra1"><a href="https://developer.mozilla.org/zh-CN/docs/Mozilla/Tech/XUL/Attribute/onextra1">onextra1</a></code>属性上设置的代码.</dd>
</dl>
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