Need to convert image format on the fly prior to display

I have a networked Multimedia Device that has a very limited Unix OS
But it does have a webserver.

I am trying to write a webpage for it that will be able to control it remotely.

To do that I take a snapshot of the MMD output and include this on the webpage. The MMD has a screengrab function, but it can only produce Bitmaps (Unix style), and it does not have any conversion tools?

IE is not able to read these bitmaps! (Although Firefox is!)

So what I want to try is to see if the webpage could include some client-side scripts that convert the image from Bitmap to Jpeg and then display the Jpeg on the webpage.

Does anyone know how I could do this?

afaik . one of the suggestion would be using activex (in win environment) , or use java applet to render

Could you suggest an applet?