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2359105
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2010-03-01T21:10:55.967
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2010-03-01T21:10:55.967
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text
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<p>There are two scenarios that I can think of where you'd want to use <a href="https://developer.mozilla.org/en/DOM/window.parent" rel="nofollow noreferrer">window.parent</a>. The first is when you have a window open another window using <code>window.open</code>. The other is where the first window uses an <code>iframe</code> to load a page. In the former case, it appears as though you actually want to use <a href="https://developer.mozilla.org/en/DOM/window.opener" rel="nofollow noreferrer">window.opener</a>, as ukostin has said. In the latter case, <code>window.parent</code> works fine. Both methods work properly whether the code is inline or loaded from an external JS file. Here are some tests:</p> <p><strong>POPUP</strong></p> <p>parentWindow.htm:</p> <pre><code><html> <head> <script>function showMsg(msg){alert(msg);}</script> <body> <a href="#" onclick="window.open('childWindow.htm','child','width=300,height=100')">Open</a> </body> </html> </code></pre> <p>externalWindow.js:</p> <pre><code>function showMsgExternal(msg){window.opener.showMsg(msg);} </code></pre> <p>childWindow.htm:</p> <pre><code><html> <head> <script>function showMsgInline(msg){window.opener.showMsg(msg);}</script> <script src="externalWindow.js"></script> </head> <body> <a href="#" onclick="showMsgInline('inline')">Inline</a> <a href="#" onclick="showMsgExternal('external')">External</a> </body> </html> </code></pre> <p><strong>IFRAME</strong></p> <p>parentFrame.htm:</p> <pre><code><html> <head> <script>function showMsg(msg){alert(msg);}</script> </head> <body> <iframe src="childFrame.htm" width="300" height="100"></iframe> </body> </html> </code></pre> <p>externalFrame.js:</p> <pre><code>function showMsgExternal(msg){window.parent.showMsg(msg);} </code></pre> <p>childFrame.htm:</p> <pre><code><html> <head> <script>function showMsgInline(msg){window.parent.showMsg(msg);}</script> <script src="externalFrame.js"></script> </head> <body> <a href="#" onclick="showMsgInline('inline')">Inline</a> <a href="#" onclick="showMsgExternal('external')">External</a> </body> </html> </code></pre>
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1. POJavaScript: Why is it so with windows.parent?
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