// Wechsel zwischen display: block/none für zwei Elemente
function toggledisplay (id1, id2) { 
	// id1
	if (document.getElementById) { 
		var obj = document.getElementById(id1);
		obj.style.display = (obj.style.display=='block'?'none':'block');
	} else if(document.all) { // IE
		id1.style.display = (id1.style.display=='block'?'none':'block');
	} else if (document.layers) { // Netscape 4.x
		document.id1.style.display = (document.id1.style.display=='block'?'none':'block');
	}
	// id2
	if (document.getElementById) { 
		var obj = document.getElementById(id2);
		obj.style.display = (obj.style.display=='block'?'none':'block');
	} else if(document.all) { // IE
		id2.style.display = (id2.style.display=='block'?'none':'block');
	} else if (document.layers) { // Netscape 4.x
		document.id2.style.display = (document.id2.style.display=='block'?'none':'block');
	}
}

// Wechsel zwischen display: block/none für ein Element
function toggledisplaysimple (id1) { 
	// id1
	if (document.getElementById) { 
		var obj = document.getElementById(id1);
		obj.style.display = (obj.style.display=='block'?'none':'block');
	} else if(document.all) { // IE
		id1.style.display = (id1.style.display=='block'?'none':'block');
	} else if (document.layers) { // Netscape 4.x
		document.id1.style.display = (document.id1.style.display=='block'?'none':'block');
	}
}

// umschalten auf display: none für ein Element
function toggledisplaynone (id1) { 
	// id1
	if (document.getElementById) { 
		var obj = document.getElementById(id1);
		obj.style.display = 'none';
	} else if(document.all) { // IE
		id1.style.display = 'none';
	} else if (document.layers) { // Netscape 4.x
		document.id1.style.display = 'none';
	}
}