spston = new Image();
               spston.src = "img/praxis05_sprechzimmer-02.jpg";
               spstoff = new Image();
               spstoff.src = "img/praxis05_sprechzimmer-01.jpg";
              
			   
			   
function inhaltbildan(welchesdenn) {
               imgOn = eval(welchesdenn + "on.src");
               document [welchesdenn].src = imgOn;
       }

function inhaltbildaus(welchesdenn) {
               imgOff = eval(welchesdenn + "off.src");
               document [welchesdenn].src = imgOff;

               window.status="";

       }