We saw at the beginning of this section that one way to embed client-side JavaScript into HTML documents is to use event handler attributes of HTML tags. The following table lists the standard event handler attributes and the HTML tags to which they may be applied. The first column of the table gives the event handler attribute name: these names always begin with "on". The second column of the table lists the HTML tags to which these attributes can be applied, and ex....

Sometimes stealing an entire computer may be too obvious or difficult, but stealing the components inside may be a lot easier. After all, anyone can tell when a computer suddenly disappears from a desk, but who will notice when a computer suddenly loses a hard drive, a video card, an external Zip drive, a trackball, or a memory chip? To stop someone from walking off with an external device, such as an external hard drive or computer speakers, you can glue a ....

Linux was developed as a freely distributable version of UNIX. UNIX is the most widely used operating system in the world and has long been the standard for high-performance workstations and larger servers. UNIX, first developed in 1969, has a strong programmer-oriented user group that supports the operating system.How did UNIX get its name? It was based on an operating systems called MULTICS (MULTiplexed Information and Computing System). Ken Thompson, Dennis Ritchie, and Bri....

This article describes how to use the Windows XP Encrypting File System (EFS) feature to store files in an encrypted format on your hard disk. Encryption is the process of converting data into a format that cannot be read by others. You can use EFS to automatically encrypt your data when it is stored on the hard disk. The Encrypting File System (EFS) is a file system driver that provides filesystem-level encryption in Microsoft Windows (2000 and later) operating systems....

When we think of Trojans, we normally think of the huge wooden horse that the Greeks gifted the city of Troy, in which they had secretly hidden a small number of their warriors. When the Trojans took the horse into the city the soldiers emerged and opened the gates to the cities enemies. Computer trojans are based on the same idea; what can appear to be useful program or harmless site can be hiding a small Trojan program that once it has infected your computer opens a secret b....