lat lon icon    iconSize    iconOffset  title   description
56.030325   14.4774116666667    http://www.medinsbiologi.se/hano/Foto.png       -10.5,-25   102_1   UV-foto

var pois = new OpenLayers.Layer.Vector("Provpunkter",
        {
        projection: map.displayProjection,
        strategies: [new OpenLayers.Strategy.Fixed()],
        protocol:   new OpenLayers.Protocol.HTTP(
            {
            url:        "../poi/DynPOIHano.txt",
            format:     new OpenLayers.Format.Text(
                {
                extractStyles: true,
                extractAttributes: true
                })
            })
        });

function hideFeatures() {
    var features = pois.features;
    for( var i = 0; i < features.length; i++ ) {
    features.style.display = 'none';
    }
    pois.redraw();
    }

$.each(pois.features, function (index, feature) {
  if ( feature.attributes.description == 'UV-foto' )
    feature.style.display = 'none';
});

function hideFeatures() {
var feature = pois.features;
        for( var i = 0; i < feature.length; i++ ) {
            if (feature[i].style.externalGraphic == "http://www.medinsbiologi.se/hano/ikon/Foto.png") {
            feature[i].style= { display: 'none' };
            }
        }
        pois.redraw();
        }