document.getElementsByClassName = function(cl) {
var retnode = [];
var myclass = new RegExp('\\b'+cl+'\\b');
var elem = this.getElementsByTagName('*');
for (var i = 0; i < elem.length; i++) {
var classes = elem[i].className;
if (myclass.test(classes)) retnode.push(elem[i]);
}
return retnode;
}; 

function switchTeamOn(theid) {
	switchTeamOff();
	document.getElementById('person' + theid).style.display="block";
}

function switchTeamOff() {
	thelist = document.getElementsByClassName('personbox');
	for (var i = 0; i < thelist.length; i++) {
		thelist[i].style.display="none";	
	}
}