[Rise]

Эдвард,

function calculator(form) {
	for (var i = 1, x = []; i < 4; i++) {
		switch (form['e'+i].value) {
			case 'ab':
				x = [1,1,''];
				break;
			case 'ac':
				x = [1,'',1];
				break;
			case 'bc':
				x = ['',1,1];
				break;
			default:
				x = ['','',''];
		}
		form['a'+i].value = x[0];
		form['b'+i].value = x[1];
		form['c'+i].value = x[2];
	}
}