function ms_select(i) {
	obj1 = document.getElementById('da' + i);
	obj2 = document.getElementById('db' + i);
	obj1.style.backgroundColor = '#DADADA'
	obj2.style.backgroundColor = '#EFEFEF'
}

function ms_unselect(i) {
	obj1 = document.getElementById('da' + i);
	obj2 = document.getElementById('db' + i);
	obj1.style.backgroundColor = ''
	obj2.style.backgroundColor = ''
}