[OpenLayers-Users] Changing the Layer displayed by a WMS

[Jon Blower]

Hi all,

I've just started playing with OpenLayers and I think it's very promising.
I'm using it mainly to display maps from a WMS.  I'd like to know how I can
dynamically change the WMS Layer that is being displayed.  For example, I've
created a WMS layer like this:

var my_wms = new OpenLayers.Layer.WMS1_3("My WMS", "http://path.to/mywms?",
        {layers: 'somelayer'});

I'd like to be able to change the "layers" parameter of the my_wms object in
response to a button click, i.e. something like this: 

my_wms.setLayers('newlayer');

This would replace 'somelayer' with 'newlayer' from the same WMS and display
it.

Any help would be much appreciated!

Thanks, Jon

-------------------------------------------------------------- 
Dr Jon Blower              Tel: +44 118 378 5213 (direct line) 
Technical Director         Tel: +44 118 378 8741 (ESSC) 
Reading e-Science Centre   Fax: +44 118 378 6413 
ESSC                       Email: jdb at mail.nerc-essc.ac.uk 
University of Reading 
3 Earley Gate 
Reading RG6 6AL, UK 
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