gistfile1.js

function loadMap()  { 

  var bbox = new OpenLayers.Bounds(156543.03389988,
                                   703424.66634662,
                                   1484712.8371452,
                                   1347941.6887318); 
       
  map = new OpenLayers.Map({
    div: "map",
    allOverlays: true
  });

  var osm = new OpenLayers.Layer.OSM();
  var gmap = new OpenLayers.Layer.Google("Google Streets", {visibility: false});

  var features = new OpenLayers.Layer.Vector("Features", {
    strategies: [ 
      new OpenLayers.Strategy.Fixed()
      //new OpenLayers.Strategy.Cluster()
    ],
    projection: map.getProjection(),
    protocol: new OpenLayers.Protocol.HTTP({
      url: "http://localhost/amaps/geojson.json",
      params: {
        
      },
      format: new OpenLayers.Format.GeoJSON(),
    }),
    styleMap: new OpenLayers.StyleMap({
      "default": {
        fillColor: "#8aeeef",
        strokeColor: "#32a8a9"
      },
      "select": {
        fillColor: "#8aeeef",
        strokeColor: "#32a8a9"
      }
    })
  }); 

  map.addLayers([gmap,osm,features]);
  map.addControl(new OpenLayers.Control.LayerSwitcher());
  map.zoomToExtent(bbox);


}