*
yesss I got the idea.
it seems great!
also i will follow your advice "display the layer with WMS" after the search
function completed.

but now when i enter the text to search (id), all features are displayed
again. not just what i searched for.

am not sure what's wrong

*

var vessels = new OpenLayers.Layer.Vector("The Vessels", { 
displayOutsideMaxExtent: true, 
styleMap: new OpenLayers.StyleMap(style),
maxExtent: new OpenLayers.Bounds(-180, -90,
180,90)transform(geographic,mercator), 
sphericalMercator: true,
strategies: [strategy], //BBOX strategy                            
protocol: wfsprotocol
                           });

*and the other parts are exactly as you wrote*

vessels.destroyFeatures();
vessels.addFeatures(request.features); 
map.zoomToExtent(sExt); 




<input type="submit" value="Search" />
<input type="text"  name="Search" id="searchText" value="Enter the id "
style="text-align:right" maxlength="100" />

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