atoms.patch

diff --git a/javascript/atoms/dom.js b/javascript/atoms/dom.js
index 4796dfe..523927c 100644
--- a/javascript/atoms/dom.js
+++ b/javascript/atoms/dom.js
@@ -618,6 +618,13 @@ bot.dom.isShown = function(elem, opt_ignoreOpacity) {
   if (!bot.dom.isElement(elem)) {
     throw new Error('Argument to isShown must be of type Element');
   }
+  // Check the element is the top element
+  var doc = goog.dom.getOwnerDocument(elem);
+  var locationOfElement = goog.style.getClientPosition(elem);
+  var elemAtPoint = doc.elementFromPoint(locationOfElement.x, locationOfElement.y);
+  if (elemAtPoint !== null && (elemAtPoint != elem)){
+    return false;
+  }

   // Option or optgroup is shown iff enclosing select is shown (ignoring the
   // select's opacity).