Photo credit: Danika Bannasch, UC Davis. Hereditary equine regional dermal asthenia (HERDA) is a genetic skin disease found in the Quarter Horse. The disease is characterized by hyperextensible, elastic skin, severe dermatologic lesions, and often scarring along the back and withers of affected horses.
Contents. 1  Introduction to style sheets. 2  Adding style to HTML Setting the default style sheet language. 3  External style sheets Preferred and alternate style sheets.  Cascading style sheets Media-dependent 1  cascades. Hiding style data from user agents.  Linking to style sheets with HTTP headers.
When creating a stylesheet internally in the web page, you will need to use the <style></style> HTML tags in the Head section of your webpage. All the code for the Internal CSS stylesheet is contained between the <head></head> section of your websites code. Below is an example of what an Internal stylesheet looks like. External CSS Stylesheet. When using an external stylesheet you must reference the stylesheet in the HTML page that is using it. You would add the code below to your HTML document to reference a stylesheet in the same location as the HTML page called style.css. You can upload the style.css page can be located anywhere in your files.