MapViewer provides functions to enable and disable the display of informational tips, the map legend, hidden themes, and the animated loading bar. The display control functions include the following:

• switchInfoStatus() enables or disables the display of informational tips. (Each call to the function reverses the previous setting.)

  You can control the initial display of informational tips by using the <hidden_info> element in theme styling rule definition (see Themes: Styling Rules) and the infoon attribute in a map request (see map_request Attributes). The switchInfoStatus() function toggles (reverses) the current setting for the display of informational tips.

• switchLegendStatus() enables or disables the display of the map legend. (Each call to the function reverses the previous setting.) The legend is initially hidden when the map is displayed.
• showTheme(theme) sets the specified theme to be visible on the map, and hideTheme(theme) sets the specified theme to be invisible on the map.
• showLoadingBar() displays the animated loading bar. The animated loading bar provides a visible indication that the loading of a new map is in progress. The bar is removed from the display when the loading is complete.