Topic: 那位大侠能给我讲讲CSS里class=和id=的区别？我看了一些书，发现他们都没有讲明白，从举的例子看两者可以通用，对吗？ @枫下论坛 The Rolia Forum

工作学习 / IT技术讨论 / 那位大侠能给我讲讲CSS里class=和id=的区别？我看了一些书，发现他们都没有讲明白，从举的例子看两者可以通用，对吗？ -eglington(eglington); 2001-3-28 (#38054@0)

class is used for CSS, which is the name of that style; id is used for Javascript, to identify the object in scripts. -bloor(bloor); 2001-3-28 (#38056@0)
You can't use them interchange. But you may also want to have a look at the name attribute, which is almost the same with id. Usually, I use both the ID and NAME, and set them to the same value. -bloor(bloor); 2001-3-28 (#38057@0)

ID is not the same with CLASS. -old(HH); 2001-4-2 {396} (#39619@0)
The ID and the CLASS in CSS are closely related with the ID and the CLASS in a document language, such as HTML, respectively. I think that the clue for understanding CSS ID and CSS CLASS is to understand the differences between ID and CLASS in a document language first. The key difference between ID and CLASS in a document language is that ID must be unique in a document, but CLASS may not be.