function switchOn(id){
	document.getElementById('ssm1').style.visibility='hidden';
	document.getElementById('ssm3').style.visibility='hidden';
	document.getElementById('ssm4').style.visibility='hidden';
	document.getElementById('ssm5').style.visibility='hidden';
	document.getElementById(id).style.visibility='visible';
}
function switchOff(id){
	document.getElementById(id).style.visibility='hidden';
}