You use the Behaviors panel (Window > Behaviors) to attach behaviors to page elements (more specifically to tags) and to modify parameters of previously attached behaviors.

Behaviors that have already been attached to the currently selected page element appear in the behavior list (the main area of the panel), listed alphabetically by event. If several actions are listed for the same event, they will be executed in the order in which they appear on the list. If no behaviors appear in the behavior list, no behaviors have been attached to the currently selected element.

The Behaviors panel has the following options:

Show Set Events

Displays only those events that have been attached to the current document. Events are organized into client-side and server-side categories. Each category’s events are in a collapsible list. Show Set Events is the default view.

Show All Events

Displays an alphabetical list of all events for a given category.

Add Action (+)

Displays a menu of actions that can be attached to the currently selected element. When you select an action from this list, a dialog box appears in which you can specify parameters for the action. If all the actions are dimmed, no events can be generated by the selected element.

Delete (–)

Removes the selected event and action from the behavior list.

Up and down arrow buttons

Move the selected action up or down in the behavior list for a particular event. You can change the order of actions only for a particular event—for example, you can change the order in which several actions occur for the onLoad event, but all the onLoad actions stay together in the behavior list. The arrow buttons are disabled for actions that can’t be moved up or down in the list.

Events

Displays a pop‑up menu, visible only when an event is selected, of all the events that can trigger the action (this menu appears when you click the arrow button next to the selected event name). Different events appear depending on the object selected. If the events you expect don’t appear, make sure that the correct page element or tag is selected. (To select a specific tag, use the tag selector at the lower-left corner of the Document window.) Also make sure that you selected the correct browser or browsers in the Show Events For submenu.

Note: Event names in parentheses are available only for links; selecting one of these event names automatically adds a null link to the selected page element, and attaches the behavior to that link instead of to the element itself. The null link is specified as href="javascript:;" in the HTML code.

Show Events For

Specifies the browsers in which the current behavior should work (this is the submenu in the Events menu). The selection you make from this menu determines which events appear in the Events menu. Older browsers generally support fewer events than newer browsers, and in most cases, the more general your choice of target browsers, the fewer events are shown. For example, if you select 3.0 and Later Browsers, the only events you can select are those available in Netscape Navigator and Microsoft Internet Explorer versions 3.0 and later—a very limited list of events.