function toggle(rowid){ // v2.0
	with (document) if (getElementById && ((row=getElementById(rowid))!==null));
	if (row.style.display == 'none') {
		row.style.display = '';
	} else {
		row.style.display = 'none';
	}
}
function extra(arg) { //v. 3.0
    with (document) if (getElementById && ((on=getElementById(arg))!==null));
    for (var i = 1; i <= 9; i++){
	
	with (document) if (getElementById && ((off=getElementById('vid' + i + ''))!==null));
	 off.style.display = 'none';
      }
     on.style.display = '';

}