#senkrecht      { background-color: #f60; visibility: visible; position: absolute; z-index: 2; top: 100px; left: 140px; width: 1px; height: 500px; clip: rect(0, 1px, 500px, 0); }
#waagrecht     	{ background-color: #f60; visibility: visible; position: absolute; z-index: 2; top: 100px; left: 140px; width: 620px; height: 1px; clip: rect(0, 620px, 1px, 0);  }
#backtop 		{ background-color: #f60; visibility: visible; position: absolute; z-index: 2; top: 0; left: 0; width: 910px; height: 10px; clip: rect(0, 910px, 10px, 0); }
#backleft 		{ background-color: #f60; visibility: visible; position: absolute; z-index: 2; top: 0; left: 0; width: 10px; height: 610px; clip: rect(0, 10px, 610px, 0); }