Style sheets separate presentation and content for web designs. The style is defined in an external style sheet file using style sheet language such as CSS.
Tips in testing your CSS layout
CSS layouts can be tested with the use of several software or applications. Opera can show the exact window dimensions in its title line, adjust window size on it to various sizes, and overlay the other browsers on that window for comparison. You can also test the URL in the IE Netrender’s web application.
How CSS style sheets work
A style sheet should be thought of as a set of instructions that suggests to a web browser how to draw a page. It is a series of instructions called statements which identifies the elements in an HTML document that it affects and it tells the browser how to draw these elements. Elements include paragraphs, links, and list items among others. Each statement has a declaration which tells a browser how an element should be drawn and it may contain any number of properties.
In creating style sheets, all key elements should be present. Each statement should have a declaration, telling how elements are to be drawn with their specific properties.
