var strSelectedTetramer = String("");

function ShowTetramer( strTetramer ) {

	// Hide the old Tetramer, if any
	if ( strSelectedTetramer != "" ) {
		DocumentObject( strSelectedTetramer, true ).display = 'none';
	}
	if ( strSelectedTetramer != strTetramer ) {
		DocumentObject( strTetramer, true ).display = 'block';
		strSelectedTetramer = strTetramer;
	} else {
		strSelectedTetramer = ""
	}
}