function box_open(id)	{

	var obj    = document.getElementById(id);

	if(obj.className == "aus")	{

		obj.className = "an";

	} else {

		obj.className = "aus";

	}

}

function box_close(id)	{

	var obj    = document.getElementById(id);
	
	obj.className = "aus";

}

function box_open_ex(id)	{

	var obj    = document.getElementById(id);

	obj.className = "an";

}