/**
 * Filename     :   layers.js
 * Copyright    :   Transport for London 2005
 * 
 * Author       :   Phil Maskell
 *
 **/
var backgrounds_grey;
var overview_layer;
var highlightMarker;
var noMapLayer;
var buffer = 2;
var gutter = 15;

function loadMapLayers() {

    backgrounds_grey = {
        layers:
                'layers/pubreg/barts_1_to_50k_grey, '
                +'layers/pubreg/barts_1_to_20k_grey, '
                +'layers/pubreg/streetview_grey, '
                +'layers/pubreg/boroughs, '
                +'layers/pubreg/adj_auth, '
                +'layers/pubreg/tlrn, '
                +'layers/pubreg/motorways ',
        format: "image/gif"
    };

    // backgrounds
    background_grey = new OpenLayers.Layer.WMS( "GREY",
        wms_server, backgrounds_grey, {singleTile: false,
        buffer: buffer, gutter: gutter, 'isBaseLayer': true
//        , transitionEffect:'resize'
//        , attribution:"<div class=\"mapCopyrightMessage\">Digital Map Data &copy; Collins Bartholomew Ltd (2006); &copy; Crown Copyright. All rights reserved (100032379) (2006).</div>"
        });

    map.addLayers([background_grey]);

}

function loadDynamicLayers() {
    highlightMarker = new OpenLayers.Layer.Markers("highlightMarker");
    map.addLayer(highlightMarker);

    var activityPointsLayer = new OpenLayers.Layer.Vector("activityPointsLayer");
    activityPointsLayer.div.id = "activityCanvas";
    map.addLayer(activityPointsLayer);

    var noMapLayer = new OpenLayers.Layer.Vector("noMapLayer");
    noMapLayer.div.id = "noMapLayer";
    map.addLayer(noMapLayer);
    noMapLayer.div.style.zIndex= 50;
    noMapLayer.div.style.width = document.getElementById("map").style.width;
    noMapLayer.div.style.height = document.getElementById("map").style.height;
}