rendering images through JS in rails

Hi,
    I am newbie to rails.
    I use an jquery ajax function to get some json data
    and have to render an image according to the result.

say

I use an jquery ajax function to get some json data
and have to render an image according to the result.

Not really a Rails question, but...

JS:
if (true){
$('#status').html(<%=IMAGE1%>);
}
else{
$('#status').html(<%=IMAGE2%>);
}

? Why don't you just return the appropriate image tag in your JSON
response, and insert it, e.g. $('#status').html(new_image_tag ?