function maxMap() {
  var widthLarge = '960px';
  var widthSmall = '705px';
  var mapLarge = '958px';
  var mapSmall = '703px';
  var heightLarge = '600px';
  var heightSmall = '450px';
  var maxText = 'Karte größer darstellen';
  var minText = 'Karte kleiner darstellen';
  if (document.getElementById('map').style.width == mapLarge) {
    document.getElementById('map').style.height=heightSmall;
	document.getElementById('map').style.width=mapSmall;
	document.getElementById('nav').style.width=widthSmall;
	document.getElementById('right').style.width=widthSmall;
	document.getElementById('zona1').style.display='block';
	document.getElementById('maxmap').innerHTML = maxText;
	document.getElementById('maxmap').style.backgroundImage='url(fileadmin/template/images/plus.gif)';
  } else {
    document.getElementById('map').style.height=heightLarge;
	document.getElementById('map').style.width=mapLarge;
	document.getElementById('nav').style.width=widthLarge;
	document.getElementById('right').style.width=widthLarge;
	document.getElementById('zona1').style.display='none';
	document.getElementById('maxmap').innerHTML = minText;
	document.getElementById('maxmap').style.backgroundImage='url(fileadmin/template/images/minus.gif)';
  }
}