function prepareMap() {
	if ( !document.getElementById || !document.getElementsByTagName ) return false;
	
	var img = document.getElementById( "africa-map-img" );
	var map = document.getElementById( "map" );
	var areas = map.getElementsByTagName( "area" );
	
	for ( i = 0; i < areas.length; i++ ) {
		areas[i].onmouseover = function() {
			img.className = this.getAttribute( "id" );
		}
		
		areas[i].onmouseout = function() {
			img.className = "";
		}
	}
}
addLoadEvent( prepareMap );