OpenLayers.Control.EraseFeature = OpenLayers.Class(OpenLayers.Control.SelectFeature, {
    onSelect: function(feature) {
        this.layer.removeFeatures(feature);
    },
    CLASS_NAME: "OpenLayers.Control.EraseFeature"
});
//Function that destroys every feature in vectorLayer and markers in markerLayer
Vtab.Application.EraseVectorFeatures = function() {
    var vectorLayer = map.getLayersByClass("OpenLayers.Layer.Vector");
    for (var i = 0; i < vectorLayer.length; i++) {
        vectorLayer[i].destroyFeatures(vectorLayer[i].features);
    }
    var markerLayer = map.getLayersByClass("OpenLayers.Layer.Markers");
    markerLayer[0].clearMarkers();
}