To show the ip via JavaScript
var ip= '<!--#echo var="REMOTE_ADDR"-->';
document.write("Your IP Address is :"+ip+" ");
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To show IP via ASP
request.ServerVariables("REMOTE_ADDR")
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TO SHOW IP VIA PHP
<?
$remote_address = getenv("REMOTE_ADDR");
echo "Your IP address is $remote_address.";
$browser_type = getenv("HTTP_USER_AGENT");
echo "You are using $browser_type.";
?>