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Conditional Redirection

Posted on 1998-09-25
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Last Modified: 2010-04-09
I would like a comprehensive understanding of the conditions under which I can redirect a visitor to another page.

I am aware of unconditional redirection such as the META|REFRESH, and conditional redirection such as NO FRAMES (if visitor's browser doesn't support frames) or NO SCRIPT (if visitor's browser doesn't support Javascript).

I beleive there are ways to redirect based on other conditionals, such as browser version.  Are there other conditionals, such as the visitor's domain name, on which I can base an automatic link to a designated page?
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Question by:bizware
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4 Comments
 

Author Comment

by:bizware
ID: 1838155
Edited text of question
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Expert Comment

by:martinag
ID: 1838156
To redirect depending on browser:
if (navigator.appName.indexOf("Netscape") != -1)
  location.href = "netscape.htm";
if (navigator.appName.indexOf("Microsoft") != -1)
  location.href = "ie.htm";
else
  location.href = "otherbrowser.htm";

Martin
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Expert Comment

by:martinag
ID: 1838157
Forgot to mention...the code I posted i JavaScript.
Use it like this:
<SCRIPT LANGUAGE="JavaScript">
<!--
if (navigator.appName.indexOf("Netscape") != -1)
  location.href = "netscape.htm";
if (navigator.appName.indexOf("Microsoft") != -1)
  location.href = "ie.htm";
else
  location.href = "otherbrowser.htm";
// -->
</SCRIPT>
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Accepted Solution

by:
jbirk earned 200 total points
ID: 1838158
Martinag is right that you can base it on browser, but you can use a much more exhaustive list than just netscape microsoft.  There's also the version numbers, and then there's opera, and a few other strage ones.
And of course you can redirect based on screen resolution, colors, and a few more thing that you can check.  All of this is done via javascript.  Some other means may be possible, but JavaScript is the most browsewr compatible method.
Also, you mentioned:  "visitor's domain name" and this cannot be done via javascript, but I think Java may have access and there are ways for javascript and java to communicate.  But when trying to determine domain name or ip address, I use cgi/perl which does a nice job.

If you wanted to use one of these methods or had something specific in mind I can provide code for you.
-Josh
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