英文css教程：Introduction CSS

Few people really know what CSS really is. That is why we need to discuss this in the following set of tutorials that we will hand out as fast as possible. We will cover basic, medium and advanced CSS in a set of CSS Tutorials that you will surely enjoy utilizing. Remember that you do need basic knowledge about HTML/XHTML in order to work with CSS. This is highly important and if you do not know HTML then you should first focus on that and then on learning from CSS Tutorials.

What is CSS?

CSS actually means Cascading Style Sheets. Styles are used to define how HTML elements are displayed. They are usually stored in STYLE SHEETS and were first seen included in HTML 4.0, with the purpose of solving a problem that appeared. These are basically external, in the sense that they are not actually included in your HTML coding. External Style Sheets are used in order to SAVE YOU WORK. CSS files are utilized to store them and you need to understand that we have the advantage of using multiple style definitions that will eventually cascade in just one.

Why did CSS appear?

As already mentioned, CSS was developed in order to solve a problem with HTML. Regular HTML tags have been built to define the actual content of one document. We were faced with simple HTML tags like <h1>, <table>, <p> etc. There was no need to use formatting tags because the actual document was taken care of by your browser. As time passed we were faced with browsers adding HTML attributes and tags. This complicated everything and eventually led to difficulty in creating web sites. The statement is extremely true when talking about sites that showed a separation between the actual presentation and the content. As a result of this problem STYLES were added to HTML 4.0 by W3C. Now we can clearly notice that all of the main web browsers out there support CSS.

Time Saved through CSS

Style sheets will save you time because they will define how some or all HTML elements are displayed. The most b

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