1 files changed, 5 insertions, 1 deletions
diff --git a/templates/html/search.js b/templates/html/search.js
index fb226f7..08d1c06 100644
--- a/templates/html/search.js
+++ b/templates/html/search.js
@@ -335,11 +335,15 @@ function SearchBox(name, resultsPath, inFrame, label, extension)
     var searchValue = this.DOMSearchField().value.replace(/^ +/, "");
 
     var code = searchValue.toLowerCase().charCodeAt(0);
-    var idxChar = searchValue.substr(0, 1).toLowerCase();
+    var idxChar = searchValue.substr(0, 1);
     if ( 0xD800 <= code && code <= 0xDBFF && searchValue > 1) // surrogate pair
     {
       idxChar = searchValue.substr(0, 2);
     }
+    else if (code <128)
+    {
+      idxChar = idxChar.toLowerCase();
+    }
 
     var resultsPage;
     var resultsPageWithSearch;