I have a scrollbar defined.
CSS is defined as:
/* root element for scrollable items */
div.scrollable div.items {
position:absolute;

/* this time we have very large space for the height */
height:20000em;
}

Here if I remove height, scrollbar shows correctly.(like for 100 items its height is large and for 5 items is small and no scrollbar is displayed) , but mousewheel does not work :(

If the height is set as above, mousewheel works but height is not set correctly...

Please help...