gistfile1

Index: dom.js
===================================================================
--- dom.js  (revision 16201)
+++ dom.js  (working copy)
@@ -708,7 +708,27 @@
   if (!positiveSize(elem)) {
        return false;
           }
           +  function isOverflowHiding(e){
           +    var parent = bot.dom.getParentElement(e);
           +    if (bot.dom.getEffectiveStyle(parent, 'overflow') == 'hidden'){
           +      var sizeOfParent = bot.dom.getElementSize_(parent); 
           +      var locOfParent = goog.style.getClientPosition(parent);
           +      var locOfElement = goog.style.getClientPosition(e);
           +      if (locOfParent.x + sizeOfParent.width < locOfElement.x){
           +        return false;
           +      }
           +      if (locOfParent.y + sizeOfParent.height < locOfElement.y){
           +        return false;
           +      }
           +      return !parent || isOverflowHiding(parent);
           +    }
           +    return true;
           +  }
            
            +  if (!isOverflowHiding(elem)){
            +    return false;
            +  }
            +
               return true;
                };