dumb question ;-)) about dynamic naming ..

in one of my partial I have :

<div id="horizontal_carousel">
  new UI.Carousel("horizontal_carousel");

but if I need to specify multi carousels, I need to dynamically modify
the name
<div id="<%= product_carousel_name(taxon) %>" >
so I would like to have :
  new UI.Carousel("<%= product_carousel_name(taxon) %>");

but I don't know how to get it ? any suggestion ?