diff --git a/hinter.js b/hinter.js
index 691da19..a15e54a 100644
--- a/hinter.js
+++ b/hinter.js
@@ -1,12 +1,12 @@
 /* Simple autocomplete for text inputs, with the support for multiple selection.
-   Homepage: http://yourcmc.ru/wiki/SHint_JS
+   Homepage: http://yourcmc.ru/wiki/SimpleAutocomplete
    (c) Vitaliy Filippov 2011
    Usage:
      Include hinter.css, hinter.js on your page. Then write:
      var hint = new SimpleAutocomplete(input, dataLoader, multipleDelimiter, onChangeListener, maxHeight, emptyText);
    Parameters:
      input
-       The input, either id or DOM element reference.
+       The input, either id or DOM element reference (the input must have an id anyway).
      dataLoader(hint, value)
        Callback which should load autocomplete options and then call
        hint.replaceItems([ [ name, value ], [ name, value ], ... ])
@@ -20,8 +20,9 @@
        dataLoader should handle it's 'value' parameter accordingly in this case,
        because it will be just the raw value of the input, probably with incomplete
        item or items, typed by the user.
-     onChangeListener
+     onChangeListener(hint, index)
        Callback which is called when input value is changed using this dropdown.
+       index is the number of element which selection is changed, starting with 0.
        It must be used instead of normal 'onchange' event.
      maxHeight
        Maximum hint dropdown height in pixels
@@ -444,10 +445,13 @@ var stopEvent = function(ev, cancelBubble, preventDefault)
 };
 
 // Remove leading and trailing whitespace
-String.prototype.trim = function()
+if (!String.prototype.trim)
 {
-    return this.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
-};
+    String.prototype.trim = function()
+    {
+        return this.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
+    };
+}
 
 // Get element position, relative to the top-left corner of page
 var getOffset = function(elem)