function check_comments () {
		var call_tel = document.getElementById('call_tel').value;
		var call_name = document.getElementById('call_name').value;
		var call_city = document.getElementById('call_city').value;

		if (call_tel == '')	document.getElementById('call_tel').style.border = '1px solid red';
		else document.getElementById('call_tel').style.border = '1px solid green';

		if (call_name == '')	document.getElementById('call_name').style.border = '1px solid red';
		else document.getElementById('call_name').style.border = '1px solid green';

		if (call_city == '')	document.getElementById('call_city').style.border = '1px solid red';
		else document.getElementById('call_city').style.border = '1px solid green';

		if ((call_name == '') || (call_tel == '') || (call_city == '')) {
			document.getElementById('err').style.display = 'block';
			return false;
		} else return true;
	}