function display(identifier){
	document.getElementById(identifier).style.display="none";	
}

function hide(){

	display("duesseldorf_container");
	display("muenchen_container");	
}

function selector(thisid){
	container=document.getElementById(thisid);
	test1=document.getElementById("duesseldorf_container");
	test2=document.getElementById("muenchen_container");
	
	link1=document.getElementById("duesseldorf_container_link");
	link2=document.getElementById("muenchen_container_link");

	
	hide()
	if(container.style.display=="block"){
	container.style.display="none";
	}else{
	container.style.display="block";
	}
	
	if(test1.style.display=="block"){
	link1.style.backgroundColor="#666666";
	link1.style.color="#DBDBD4";
	}else{
	link1.style.backgroundColor="#DBDBD4";
	link1.style.color="#333333";	
	}	
	
	if(test2.style.display=="block"){
	link2.style.backgroundColor="#666666";
	link2.style.color="#DBDBD4";
	}else{
	link2.style.backgroundColor="#DBDBD4";
	link2.style.color="#333333";	
	}
}


function hide2(){

	display("deutsch_container");
	display("english_container");	
}

function selector2(thisid){
	container=document.getElementById(thisid);

	test3=document.getElementById("deutsch_container");
	test4=document.getElementById("english_container");
	

	link3=document.getElementById("deutsch_container_link");
	link4=document.getElementById("english_container_link");
	
	hide2()
	if(container.style.display=="block"){
	container.style.display="none";
	}else{
	container.style.display="block";
	}
	
	if(test3.style.display=="block"){
	link3.style.backgroundColor="#666666";
	link3.style.color="#DBDBD4";
	}else{
	link3.style.backgroundColor="#DBDBD4";
	link3.style.color="#333333";	
	}	
	
	if(test4.style.display=="block"){
	link4.style.backgroundColor="#666666";
	link4.style.color="#DBDBD4";
	}else{
	link4.style.backgroundColor="#DBDBD4";
	link4.style.color="#333333";	
	}			
}