Prevent FF and Chrome from clearing input value

hinter.js

@@ -138,6 +138,8 @@ SimpleAutocomplete.prototype.init = function()
     this.addRmListener('change', function() { return self.onChange(); });
     this.addRmListener('focus', function() { return self.onInputFocus(); });
     this.addRmListener('blur', function() { return self.onInputBlur(); });
+    // Set autocomplete=on to prevent FF and Chrome from clearing inputs on Back click
+    addListener(window, 'beforeunload', this.closure['beforeunload'] = function() { e.autocomplete = 'on'; });
     addListener(t, 'mousedown', function(ev) { return self.cancelBubbleOnHint(ev); });
     this.onChange();
 };
@@ -193,6 +195,8 @@ SimpleAutocomplete.prototype.remove = function()
     if (!this.hintLayer)
         return;
     this.hintLayer.parentNode.removeChild(this.hintLayer);
+    removeListener(window, 'beforeunload', this.closure['beforeunload']);
+    delete this.closure['beforeunload'];
     for (var i in this.closure)
     {
         removeListener(this.input, i, this.closure[i]);