function toggleMap() {

	if (document['planbild'].src.substring(document['planbild'].src.length-5, document['planbild'].src.length-4) == "2") {
		changeImages('planbild', 'images/lage_inhalt_plan_1.gif');
		document.getElementById("planarea").coords = "90,78,167,78,167,143,141,143,152,191,265,191,265,210,149,210,148,205,134,143,90,143";
	} else {
		changeImages('planbild', 'images/lage_inhalt_plan_2.gif');
		document.getElementById("planarea").coords = "6,4,6,237,280,237,280,4,144,4";
	}
	return true;

}