function DispContacts(id) {
	var onid = 'ofc' + id;
	var onlnid = 'lnk' + id;
	if (id==20) {
		var offid = 'ofc' + (id+10);
		var offlnid = 'lnk' + (id+10);
	}
	else {
		var offid = 'ofc' + (id-10);
		var offlnid = 'lnk' + (id-10);
	}
	document.getElementById(onid).style.display = 'block';
	document.getElementById(offid).style.display = 'none';
	document.getElementById(onlnid).className = "crn";
	document.getElementById(offlnid).className = "";
}