info = new Array("reiter", "ausritt", "gruppe", "zelten");

function roll(id) {
	if (document.all) {
		var obj1 = document.all.reiter.className;
		var obj2 = document.all.ausritt.className;
		var obj3 = document.all.gruppe.className;
		var obj4 = document.all.zelten.className;
		if (id == 'reiter') {document.all.reiter.className = "open";}
		if (id == 'ausritt') {document.all.ausritt.className = "open";}
		if (id == 'gruppe') {document.all.gruppe.className = "open";}
		if (id == 'zelten') {document.all.zelten.className = "open";}
	} else {
		var obj = document.getElementById(id).getAttribute("class");
		if (obj == "closed") {
			document.getElementById(id).setAttribute("class", "open");
		}
	}
}

function rollout() {
  	if (document.all) {
	  	document.all.reiter.className = "closed";
	  	document.all.ausritt.className = "closed";
	  	document.all.gruppe.className = "closed";
	  	document.all.zelten.className = "closed";
  	} else {
		for (var i = 0; i < 4; i++) { 
		  	document.getElementById(info[i]).setAttribute("class", "closed");
		}
  	}
}