Fix a small bug.

iacr/collaborators.inc

@@ -19,11 +19,14 @@
  function fetchData() {
    let name = document.getElementById('firstName').value + ' ' + document.getElementById('lastName').value;
    let cryptodb = null;
-   let tags = document.getElementsByName('tags')[0].value.split(' ');
-   for (let i = 0; i < tags.length; i++) {
-     let parts = tags[i].split('#');
-     if (parts.length == 0 && parts[0] == 'cryptodb') {
-       cryptodb = parts[1];
+   let tags = document.getElementsByName('tags');
+   if (tags) {
+     tags = tags[0].value.split(' ');
+     for (let i = 0; i < tags.length; i++) {
+       let parts = tags[i].split('#');
+       if (parts.length == 0 && parts[0] == 'cryptodb') {
+         cryptodb = parts[1];
+       }
      }
    }
 
@@ -92,5 +95,9 @@
 <div class="g">
   <div style="display:none;margin:5px;padding: 5px;border: 1px solid red;color:red" id="iacrError"></div>
   <strong style="color:green">Import from IACR: </strong>
-  <button type="button" class="ml-2 button button-primary" onclick="fetchData();return false">Fetch recent coauthors</button>
+  <button type="button" class="ml-2 button button-primary" onclick="fetchData();return false">Fetch some recent coauthors</button>
 </div>
+  <div>
+  <strong>NOTE:</strong>The button above is only assist to help you find your recent coauthors. It will not import
+coauthors from ACM or other venues. It is your responsibility to supply your potential conflicts.
+  </div>