Obfuscate the Spammer's Robot

Most email users should have experience of receiving junk email. For me, my HongKong.com account, it receives around 100 junk email each day. This wastes our time to filter the email and makes us feel annoying.

Do you know how a spammer get your email addresses? Actually, your email addresses may already be put on the Web which can be accessed by the public. For example, in web-sites of many companies, they put contact lists containing email addresses of its staff. spammers use a program, called robot, to automatically retrieve email addresses on the Web. The spammers' robots move on the Web and try to get the email addresses. So, don't put your email addresses publicly.

However, sometimes you can't avoid it. So, it is suggested to post your email addresses on the Web in a obfuscated form. For example:

john [at] google [dot] com

The robot is a very simple program which can only recognize the email addresses in the form of "xxx@xxxx.xxx". Once the email address is transformed, the robot can't recognize it, but human can. However, it is not user-friendly. I suggest to use JavaScript to transform the the obfuscated email addresses back when mouse is over the email addresses. Here is a real example in my homepage: Contact. Such that, someone can copy and past the email address directly.