block IPs access to hosting with JavaScript

[ILikeT]

I'm looking for a script to block a large group of IP addresses (half of the world). I try to use .htaccess file but it became 2 MB. Maybe using JavaScript I can also block IP addresses.

[OuTpOsT]

I have a proposal:
Rather than block these IP addresses, better redirect them (For example to Google)

<script type="text/javascript">
var bannedips=["123.123.123.123, "234.234.234.234", "121.121.121.121"]
var ip = '<!--#echo var="remote_addr"-->'
var handleips=bannedips.join("|")
handleips=new RegExp(handleips, "i")
if (ip.search(handleips)!=-1){
alert("Your IP has been banned")
window.location.replace("http://www.google.com")
}
</script>

To operate this script, hosting server must have SSI (HostICan support SSI)