Pete, I managed to do this in 2 different ways :
1. Use the alpha hack on .png var boundaries = new OpenLayers.Layer.WMS("Layer1", "http://your-url", { layers: "0,1,2" ,transparent: "true" ,srs: "EPSG:3035" }, {'buffer':0, 'format':"image/png", 'isBaseLayer':false, 'transparent':true}, {'alpha':true} ); 2. Specify "image/gif" as the format ( but I think you specify your format in the wrong place !! ) var boundaries = new OpenLayers.Layer.WMS("Layer1", "http://your-url", { layers: "0,1,2" ,transparent: "true" ,srs: "EPSG:3035" }, {'buffer':0, 'format':"image/gif", 'isBaseLayer':false, 'transparent':true} ); Both work in Firefox, IE6 and IE7 Peter Dawn wrote: > > > now i need to use IE6, hence my image format needs to be GIF (as you > know PNG is not supported by IE6). > > so my question is how can i achieve layer transparency with IE6 and > GIF format. i have tried > > untiled = new OpenLayers.Layer.WMS( > "Locality", "http://localhost:8080/geoserver/wms", > { > height: '600', > width: '600', > layers: 'my_layer', > styles: '', > transparent: 'TRUE', > format: format, > tiled: 'true', > }, > > but am still not able to achieve transparency. if i use PNG and use > firefox it works. but i need to use IE6 and hence GIF. > > any help. > > thanks. > pete. > _______________________________________________ > Users mailing list > Users@openlayers.org > http://openlayers.org/mailman/listinfo/users > > -- View this message in context: http://n2.nabble.com/IE6-GIF-transparency-issue-tp2972366p2973736.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list Users@openlayers.org http://openlayers.org/mailman/listinfo/users