function toggleView()
{
     theimg = document.getElementById('anfahrtimage');
     if(theimg.src.indexOf('Nahansicht') == -1) {
         viewState = 1;
         theimg.src='uploads/media/endmark_Nahansicht_01.jpg';
     }
     else {
         theimg.src='uploads/media/endmark_weitsicht.gif';
     }
}