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var map, cacheRead;
function init() {
map = new OpenLayers.Map({
div: "map",
projection: "EPSG:900913",
layers: [
new OpenLayers.Layer.WMS("OSGeo", "http://vmap0.tiles.osgeo.org/wms/vmap0", {
layers: "basic"
}, {
eventListeners: {
tileloaded: updateHits
}
})
],
center: [0, 0],
zoom: 1
});
cacheRead = new OpenLayers.Control.CacheRead();
map.addControl(cacheRead);
// User interface
var status = document.getElementById("status"),
hits = 0;
// update the number of cached tiles and detect local storage support
function updateHits(evt) {
hits += evt.tile.url.substr(0, 5) === "data:";
if (window.localStorage) {
status.innerHTML = hits + " cache hits.";
} else {
status.innerHTML = "Local storage not supported. Try a different browser.";
}
}
}
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