function listVision(id1,id2,id3)
{
	if (document.getElementById(id1).style.display == "none") {
		document.getElementById(id1).style.display = "";
		document.getElementById(id2).style.display = "";
		document.getElementById(id3).style.display = "none";
	}
	else {
		document.getElementById(id1).style.display = "none";
		document.getElementById(id2).style.display = "none";
		document.getElementById(id3).style.display = "";
	}	
}