HTML and CSS Reference
3. Save your changes to the file and then reopen survey.htm in your Web browser.
Verify that you can now select multiple items from the information source list using
the ctrl+click, command+click, or shift+click keyboard and mouse combinations.
Grouping Selection Options
In long selection lists, it can be difficult for users to locate a particular option value. You
can organize selection list options by placing them in option groups using the optgroup
<optgroup label=” label1 ”>
<optgroup label=” label2 ”>
where label1 , label2 , and so forth are the labels for the different groups of options.
The text of the label appears in the selection list above each group of items but is not a
selectable item from the list. Figure 6-34 shows an example of a selection list in which
the options are divided into two groups.
Organizing a selection list with option groups
rendered selection list