function changeTab(id, off, off2, off3) {
	document.getElementById(id).className = "on";
	document.getElementById('card_' + id).style.display = "block";
	
	document.getElementById(off).className = "switch";
	document.getElementById(off2).className = "switch";
	document.getElementById(off3).className = "switch";
	
	document.getElementById('card_' + off).style.display = "none";
	document.getElementById('card_' + off2).style.display = "none";
	document.getElementById('card_' + off3).style.display = "none";
}