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| This page is for people who want to have their code executed each time a new page is loaded in browser/mail.
| | #redirect [[On page load]] |
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| You need to create an overlay to <tt>chrome://browser/content/browser.xul</tt> (Firefox), <tt>chrome://navigator/content/navigator.xul</tt> (browser - Mozilla Suite) or <tt>chrome://messenger/content/messenger.xul</tt> (Thunderbird and Mozilla Mail) and add a ''load'' event listener to ''appcontent'' element (browsers) or ''messagepane'' (mail):
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| <pre>window.addEventListener('load', onInit, false);
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| function onInit() {
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| var appcontent = document.getElementById("appcontent"); // browser
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| if(appcontent)
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| appcontent.addEventListener("load", onPageLoad, true);
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| var messagepane = document.getElementById("messagepane"); // mail
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| if(messagepane)
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| messagepane.addEventListener("load", onPageLoad, true);
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| }
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| function onPageLoad(aEvent) {
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| var doc = aEvent.originalTarget; // doc is document that triggered "onload" event
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| // do something with the loaded page.
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| // doc.location is a Location object (see below for a link).
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| // You can use it to make your code executed on certain pages only.
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| if(doc.location.href.search("forum") > -1)
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| alert("a forum page is loaded");
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| }
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| </pre>
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| Of course, you need to use [[Dev : Javascript coding guidelines|unique identifiers]] instead of generic ''onInit'' and ''onPageLoad''.
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| See cdn's URIid extension for a working example.
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| ===References===
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| [http://xulplanet.com/references/objref/Location.html Location object]
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