function changeDisplay(onid, ontab) {
	var onID = document.getElementById(onid);
	var onTab = document.getElementById(ontab);
	for (i = 1; i < 8; i++) {key = 't' + i;if (document.getElementById(key) != null) {document.getElementById(key).style.display = 'none';}
	key='u'+i;if(document.getElementById(key)!=null){document.getElementById(key).className='mss-tab';}}if (onID) onID.style.display = 'block';if (onTab) onTab.className= 'mss-tab-on';}changeDisplay('t1', 'u1');