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