HTMLを書く際に悩むことは多々あるが、中でも悩ましいことのひとつにidやclassで指定する「名前」がある。わかりやすく一貫性がある名前を ...

Ryan Boudreaux continues his tutorial on getting acquainted with jQuery by showing you how to get objects by ID and Class selectors and by Tag and Attribute.

An id has to be unique on the page, while a class does not. That's the biggest distinction right there. If you need multiple things to behave the same, you use a class, and set all of their ...

In HTML, it is forbidden to have ID values that are identical to other IDs within the same document.<HR></BLOCKQUOTE><BR>Quoted from Eric A. Meyer's excellent book <I>Cascading Style Sheets: The ...