case 'targets':
targets.style.display = "block";
records.style.display = "none";
- blanket.style.display = "none";
+ if (blanket) { blanket.style.display = "none"; }
break;
case 'records':
targets.style.display = "none";
records.style.display = "block";
- blanket.style.display = "block";
+ if (blanket) { blanket.style.display = "block"; }
break;
default:
alert('Unknown view.');