html iframe

window.frameElement

返回嵌入当前window对象的元素(比如 </span></code> 或者 <code class="hljs apache"><span class="hljs-section"><object></span></code>),如果当前<code class="hljs coffeescript"><span class="hljs-built_in">window</span></code>对象已经是顶层窗口,则返回<code class="hljs coffeescript"><span class="hljs-literal">null.</span></code></pre>
<pre><span style="color: rgba(255, 0, 0, 1)">var frameId = window.frameElement && window.frameElement.id || '';<br><br><br></span></pre>
<p>1.在iframe子页面中获取父页面的元素：</p>
<pre>window.parent.document这个是获取父页面document中的对象；</pre>
<pre>如果要获取父页面js中的方法：window.parent.xxxx（）；xxxx()为方法；</pre>
<pre></pre>
<p>2.在父页面中获取iframe子页面中的元素：</p>
<p>     var child = document.getElementByIdx_x("mainFrame").contentWindow;//mainFrame这个id是父页面iframe的id</p>
<p>     child.document;//获取子页面中的document对象；</p>
<pre><span style="color: rgba(255, 0, 0, 1)"> </span></pre>
						  
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