<StyleMap>

<StyleMap id="ID">
  <Pair id="ID">
    <key>normal</key>
        <!-- kml:styleStateEnum:  normal or highlight -->
    <styleUrl>...</styleUrl> or <Style>...</Style>
  </Pair>
</StyleMap>

Description

A <StyleMap> maps between two different styles. Typically, a <StyleMap> element is used to provide separate normal and highlighted styles for a placemark, so that the highlighted version appears when the user mouses over the icon in the Earth browser. See Chapter 4, Styles and Icons.