You can also use the name of a color within the quotes, if you know the official names of the colors. The definition of structured programming used by the US Government imposes these limits on any programming code. Looping should be limited to the use of formal looping structures. An HTML document is a plain text document, but it uses sets of tags to cause the browser to display things in special ways. A comment is a message for human eyes, not intended for display by the browser.
Tags can be in uppercase or lowercase letters.
We have normally used uppercase for HTML and lowercase for JavaScript. Most HTML tags come in pairs, marking the start and end of the object or effect being used. The HEAD of the document is designed to provide information about the webpage document, but JavaScript can be inserted there and any personally-defined functions need to be defined there. The BODY of the document holds the contents of the document, and JavaScript can be inserted here as well. The following reference is organized in the order that these tags might be typically used in a webpage.