Do not update navi if it's not there

and avoid a JS error

diff --git a/mkdru.client.js b/mkdru.client.js
index 352cae0..371818e 100644 (file)
--- a/mkdru.client.js
+++ b/mkdru.client.js
@@ -230,16 +230,17 @@ mkdru.limitQuery = function (field, value) {
 };
 
 mkdru.limitTarget = function (id, name) {
-  var navi = document.getElementById('mkdru-navi');
-  navi.innerHTML = 
-        'Source: <a class="crossout" href="#" onclick="delimitTarget();return false;">'
-        + name + '</a>';
-  navi.innerHTML += '<hr/>';
   mkdru.state.filter = 'pz:id=' + id;
   mkdru.pollDropDowns();
   mkdru.resetPage();
   mkdru.hashFromState();
   mkdru.search();
+  var navi = document.getElementById('mkdru-navi');
+  if (!navi) return false;
+  navi.innerHTML = 
+        'Source: <a class="crossout" href="#" onclick="delimitTarget();return false;">'
+        + name + '</a>';
+  navi.innerHTML += '<hr/>';
   return false;
 };