function change(eins,zwei) {

	if (document.getElementById) {  

		var mydiv = document.getElementById(eins); 
		mydiv.style.display = (mydiv.style.display=='none'?'block':'none');

		var mydiv = document.getElementById(zwei); 
		mydiv.style.display = (mydiv.style.display=='block'?'none':'block');

	} 

}