--- trunk2/eurovoc/js/usage.js	2004/10/18 15:25:03	516
+++ trunk2/eurovoc/js/usage.js	2004/10/18 17:59:37	517
@@ -28,7 +28,8 @@
 function go(f)
 {
   var form = document.getElementById('search');
-  var query = document.form.elements['query'].value;
+  var query = null;
+  if (document.form.elements['query']) query = document.form.elements['query'].value;
   var index_name = document.form.elements['index_name'].options[document.form.elements['index_name'].selectedIndex].value;
 
   if(!query)