[MetaCRS] Proj4js: Bonne projection

[Jan Hartmann]

Hi all,

I am working on a series of old maps using the Bonne projection with the 
following Proj-string:

  +proj=bonne +lat_1=51.5000 +lon_0=4.8838828  +a=6376950.4 +rf=309.65 
+units=m +no_defs <>

Works fine with gdal, mapserver and postgis, but not with proj4js, as 
used in OpenLayers. If I add this definition to my OpenLayers 
application, to get a real time displayProjection of the original map 
projection, I get two large numbers, zeroed on lat and lon 0. Changing 
parameters doesn't make any difference. In looking at the proj4js code, 
I don't see any mention of bonne. So here are two questions:

-how can the bonne projection be added to proj4js?
-how can this projection be added to OpenLayers?

Jan
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