JavaScript Made Easy: Free JavaScripts Tutorials Example Code

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JavaScript Basics

Inserting Javascript

Complete Tutorial

Advance DHTML Tutorial



IP Address Filter

(Netscape 4.0+ with Java enabled only!) JavaScript can prevent visitors with certain IP addresses from visiting your site. Simply enter part of their IP address (the more you enter the greater the chance only the intended person will not be able to enter your site) and they will not be able to enter the site. If anyone has a Internet Explorer workaround, we'd love to post it here! Netscape Only


Insert into <HEAD>
<SCRIPT LANGUAGE="JavaScript"> <!-- Begin netscape = (navigator.appName.indexOf("Netscape") != -1); version4 = (navigator.appVersion.indexOf("4.") != -1); if (netscape && version4) { ip = "" + java.net.InetAddress.getLocalHost().getHostAddress(); if (ip.indexOf("207.136") >= -1) // This would block anyone from 207.136.xxx.xxx { alert("You are not permitted to access this site."); history.go(-1); } } // End --> </script>

Insert into <BODY>


Other Options