function cqtoggle(elem1){
	var div1 = document.getElementById(elem1)
	obj = new Array("A", "B", "C", "D");
	
	for (var i = 0; i < obj.length; ++i) {
		var o = document.getElementById(obj[i])
		if(o != div1) {
		if(o) o.style.display = 'none';
		else alert('Die ID:' + obj[i] + ' existiert nicht!');
		}
	}

	if (div1.style.display == 'none') {
		div1.style.display = 'block'
	} else {
		div1.style.display = 'none'
	}
}