Cursor change on visible layers in the map

[sirib]

I added one dynamicmapservice layer on the map.
csa_tmMap = new esri.layers.ArcGISDynamicMapServiceLayer(""url, {id:csa_tmMap , visible:true});
                map.addLayer(csa_tmMap );

Here my requirement is when ever i move the mouse cursor on the  layer, we need to change the  mouse cursor.
Could you please help me how to change the cursor when it move to dynamicmapservice layer

Thanks
Siri