function selekt (a) {

	
	var ps = document.getElementById('offices').getElementsByTagName('div');
		for (var i=0; i<ps.length; i++ ) {
		ps[i].style.display="none"
		}
	document.getElementById(a.value).style.display="block";
	return true;
	
}

function toggle_checkbox (a)
{
	a.getElementsByTagName('input')[0].checked = !a.getElementsByTagName('input')[0].checked
}
function set_radio (a) {
	a.getElementsByTagName('input')[0].checked = true
}