Sometimes we want to hide some content at first page load to reduce bandwidth transferred to the user. Usually when we just want to show the thumbnails of the image and then the original (big) sized image hidden next to it.

Annoyed with form submitters that keep fills the email form field with an invalid email? You can use javascript’s regular expressions to validate it. There’s so many regular expressions form to validate e-mail on the internet but many of them is very long and difficult to understand to modify to suit my need. The regular expressions is expressed below:

/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,60})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i

Another HOAX e-mail spreads in my inbox:

Informasi dari Applecorp

Pelanggan yang terhormat,
Kami beritahukan kepada seluruh pelanggan bahwa perusahaan kami, Apple Corporation yang berkantor pusat di Cupertino, California US membuka kantor pemasaran di Jakarta, Indonesia

Actually you can’t ping a specific port by using the ping command to test whether specified port is open or not. The ping command is used to test specified node/host whether it is live or not. It uses ICMP packets (wiki.answers.com).

You can test a port whether it is live or not by telneting the port using the telnet command. The telnet command is a utility to connect over TCP and defaults to port 25 23 (make a TCP connection to port 25 23 on remote computer/server). But if you specify a different port than 25 23, then what the telnet command do is opening a TCP connection on the specified port to the remote computer/server.