Passing image id to USEMAP OnClick function

Question

I am using usemap for set of images

<map name="movemap">
    <area shape="rect"  coords="0,0,200,200" a href="" onclick="jumps(); return false;">
</map>

I have a set of images which use the map. E.g.,

<img id=1 usemap=#movemap src=abc.gif />
<img id=2 usemap=#movemap src=def.gif />
<img id=3 usemap=#movemap src=xyz.gif />

Now within jumps() function I need to know which image was clicked. So in the jumps() onclick function, how can I get id of the image which was clicked by user.