#BlauerRand {
	padding:5px; 
	background-color:blue; 
	width:auto; 
  height: auto;
}

#GelberRand {
	padding:5px; 
	background-color:yellow; 
	width:auto; 
  height: auto;
}

#GrauerRand {
	padding:5px; 
	background-color:white; 
	border:2px #8d8d8d solid;
	width:auto; 
	height:auto;
}

#main {
  margin-top: 10px;
  margin-left: 7em; 
  margin-right: 1em;
  padding: 1px 0 1px 5%;
	width:auto; 
  min-height: 400px; /* nur FireFox */
  height: auto;
}

.prop { height:400px; float:right; width:1px; bg-color:blue; }
.clear { clear:both; height:1px; overflow:hidden; }
* html #main {height:400px;} /* bis 6 */
html + body #main {height:400px;} /* ie 5*/
* html .prop {display:none} /* bis 6 */