Why are you using id so much?

ID's are good to use sometimes. They can override most things, so if the rule is important you want to use an ID.

Here are some more reasons why ID's are good:

Classes have no special abilities in the browser, but ID's do have one very important trick up their sleeve. This is the "hash value" in the URL. If you have a URL like http://yourdomain.com#comments, the browser will attempt to locate the element with an ID of "comments" and will automatically scroll the page to show that element. It is important to note here that the browser will scroll whatever element it needs to in order to show that element, so if you did something special like a scrollable DIV area within your regular body, that div will be scrolled too.

This is an important reason right here why having ID's be absolutely unique is important. So your browser knows where to scroll!

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Generally you want to use id for unique elements on the page. Classes are not unique. For example, it would make sense to create an id called Navbar since you should only have one main navigation bar element on a page. It would make sense to create a class called BlueText since many elements might have blue text in your document. Your Navbar id could also have a Class of BlueText if you wanted the navigation bar element to have blue text, like this:

<div id="navbar" class="bluetext some_other_class yet_another_class">

This has less to do with styling and CSS than with defining unique elements of the DOM. You can use as many classes as needed on a tag, but an id must be unique to the document.

True. It also is because ID's are unique

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