Grab IP Address with JavaScript

[Merri]

If you have Server Side Includes (SSI/SHTML) then you can do:

<script type="text/javascript">
var ip = '<!--#echo var=REMOTE_ADDR -->';
alert('Your IP is ' + ip);
</script>

What happens here is that before the page is sent by the server, the SSI parses the page, finds the #echo statement and replaces the HTML comment with IP address of the client. Thus JavaScript on the client machine is like var ip = '0.0.0.0';

Most often SSI must be enabled separately for .htm and .html pages, this can be done using .htaccess. Or just use .shtml.