/************
// Bild			: { Objektdaten }
"bild-2" : 		  {
				url: 'Bild2.png', 
				imageSize: [722, 154],
				projection: proj,
				imageExtent: proj.getExtent() 
                          }
*************/
				
var bilder_switched = {
	"bild-switch_2" : {
                url: 'Bild2.png', 
                imageSize: [722, 154],
                projection: proj,
                imageExtent: proj.getExtent() 
		},
	"bild-switch_1" : {
                url: 'Bild1.png', 
                imageSize: [122, 44],
                projection: proj,
                imageExtent: proj.getExtent()
		}	
};


function switchChecked {
	for key in (bilder_switched) {
		if(document.getElementById(key).checked){
			newL = new ol.layer.Image(bilder_switched[key]);
			map.removeLayer(baseLayer);
			map.addLayer(newL);
                }
	}
}