Drag/Drop with Image Maps

Hi all,

Is it possible to use HTML area objects from an image map as
droppables for a drag/drop interface? I want to get a different
response depending on which part of an image I drop a draggable div
object on. The context is creating an incident report form where
injuries can be dragged onto a body sketch. I've tried this using the
code below. However, the droppable is always identified as
"front_head", the first area object, no matter which part of the image
is dropped on. Has anyone managed to get this working successfully, or
found a way to achieve a similar effect?

Many thanks,
Adam

<%= image_tag "body_sketch_front.gif", :usemap => "#front" -%>

<map id="front_map" name="front">
        <area id="front_head" shape="circle" coords="100,30,20"
href="#" alt="head" title="head"></area>
        <area id="front_torso" shape="rect" coords="70,70,120,150"
href="#" title="torso"></area>
</map>

<div id="injury_1" class="injury">punch</div>
<div id="injury_2" class="injury">kick</div>

<div id="description"></div>

<script type="text/javascript">
        $$(".injury").each(function(el){
                new Draggable(el,{revert:true});
        })
        $$('#front_map area').each(function(el){
                Droppables.add(el,{
                        accept:'injury',
                        onHover:function(drag,drop){
                                // Some function to let us know what's
going on
                                $('description').innerHTML=drag.title
+ " on " + drop.title;
                        },
                        onDrop:function(drag, drop){
                                // Some function to respond to the
dropped injury
                                alert("Dropped "+drag.id+"on"+el.id)
                        }
                })
        })
</script>