function msf_switcher(id){
	switch(id){
		case 'don':
			document.getElementById('msf_don').style.display = 'block';
			document.getElementById('msf_obl').style.display = 'none';
			document.getElementById('sw_don').className = 'current';
			document.getElementById('sw_obl').className = '';
			break;
		case 'obl':
			document.getElementById('msf_don').style.display = 'none';
			document.getElementById('msf_obl').style.display = 'block';
			document.getElementById('sw_don').className = '';
			document.getElementById('sw_obl').className = 'current';
			break;
	}
}

function msf_checkobl(el){
	var checks = document.getElementById('msf_obl_checks').getElementsByTagName('INPUT');
	
	for(var i=0; i<checks.length; i++)
		checks[i].checked = el.checked;
}