Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z] radio buttons random URL generator readability, whitespace and readonly attribute (form controls) rectangular image map area Redirect header redundant HTML tags references inline to external content to multimedia elements Refresh header rel attribute <a> <link> relationships between HTML documents between hyperlinks relative font size relative frame sizes relative URLs 2nd <base> tags advantages of using repeat keyword repetition grammar rules, elements Requests for Comments (RFCs) reserved characters reset buttons resizing images reusing images rev attribute <a> <link> RFCs (Requests for Comments) RGB color values 2nd ridged borders rows attribute <frameset> <textarea> rows, creating in tables 2nd rowspan attribute (<th> and <td>) ruby text rules rules attribute (<table>) |