16.6. Combo Boxes and List Boxes
A SELECT element presents a set of options to the user. If only a single entry can be selected and no visible size has been specified, the options are presented in a combo box (drop-down menu); list boxes are used when multiple selections are permitted or a specific visible size has been specified. The choices themselves are specified by OPTION entries embedded in the SELECT element. The typical format is as follows:
<SELECT NAME="Name" ...> <OPTION VALUE="Value1">Choice 1 Text <OPTION VALUE="Value2">Choice 2 Text ... <OPTION VALUE="ValueN">Choice N Text </SELECT>
The HTML 4.0 specification suggests the use of OPTGROUP (with a single attribute of LABEL) to enclose OPTION elements in order to create cascading ...