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Chilkat wishes to thank Thomas Granger and TemplateKit.com
for permission to reproduce this article:
Using Javascript in your
HTML Email Messages
Thomas
Granger
| Thomas Granger
is the owner of Florentine Design and Publisher of Template
Kit. He is of a strange breed of legal professionals who has
a degree in law and computer science. |
Using Javascript in Your HTML Email
Since Javascript's are mainly a unique and proprietary
element, and by this we mean that you can write 100 different
scripts which all do basically the same thing but in a different
manner, complex JavaScripts will always have trouble in your HTML
email.
Due to the wide variety of email clients, browsers,
security settings, updates, and service packs installed, it is
difficult to predict how a script will execute against any given
email client. Javascripts can cause browsers & Outlook 2000
to disable and active scripting contained in an email document
(there has been an increase in email security due to malicious
scripts).
For more information on Microsoft Outlook & Office
Security visit:
Outlook E-mail Security Update Information
http://support.microsoft.com/support/kb/articles/q262/7/01.asp
How Outlook Renders HTML
http://support.microsoft.com/support/kb/articles/q249/9/72.asp
You would be wise to test any Javascript you wish
to include in a mailing. Not all email clients can handle the
scripts, and most web-based systems disable scripts as a general
rule to prevent malicious code from being executed on a system.
Javascript Navigation forms such as jumpmenu forms
can easily be use, but even these will only work in non web-based
email clients. Most other navigation forms are not supported because
they do not work on the majority of web-based email clients.
Most Forms, which use the GET/POST method, will render and test
correctly in web-based email clients.. You can often use this
to get around many Javascript problems in HTML email.
Remember! Most web-based email browsers are a <FORM> themselves
and use Javascript to power their product in some way or another.
Your script has to be fairly inoccuous in order to not interfere
with their product.
We'll be providing some more examples as we expand of this collumn
in the near future.
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