我建议使用setInterval而不是setTimeout。
这是一些代码，使用您提供的JSON并通过为每个标记添加必需的“
description”成员，在小提琴中通过JSON模拟更新：
var map = null;var gmarkers = [];var intervalNumber = 0;setInterval(function () { new Request.JSON({ url: '/echo/json/', data: { json: JSON.enpre([{ "lat": 35.6606376 + (0.01 * intervalNumber), "lng": -80.5048653 + (0.1 * intervalNumber), "content": "bca", "description":"first marker" }, { "lat": 42.6799504 + (0.01 * intervalNumber), "lng": -36.4949205 - (0.1 * intervalNumber), "content": "abc", "description": "second marker" }]), delay: 3 }, onSuccess: function (response) { update_map(response); intervalNumber++; } }).send();}, 5000);update_map = function (data) { var bounds = new google.maps.LatLngBounds(); // delete all existing markers first for (var i = 0; i < gmarkers.length; i++) { gmarkers[i].setMap(null); } gmarkers = []; // add new markers from the JSON data for (var i = 0, length = data.length; i < length; i++) { latLng = new google.maps.LatLng(data[i].lat, data[i].lng); bounds.extend(latLng); var marker = new google.maps.Marker({ position: latLng, map: map, title: data[i].title }); var infoWindow = new google.maps.InfoWindow(); google.maps.event.addListener(marker, "click", function (e) { infoWindow.setContent(data.description+"<br>"+marker.getPosition().toUrlValue(6)); infoWindow.open(map, marker); }); (function (marker, data) { google.maps.event.addListener(marker, "click", function (e) { infoWindow.setContent(data.description+"<br>"+marker.getPosition().toUrlValue(6)); infoWindow.open(map, marker); }); })(marker, data[i]); gmarkers.push(marker); } // zoom the map to show all the markers, may not be desirable. map.fitBounds(bounds);};function initialize() { // initialize the map on page load. var mapOptions = { center: new google.maps.LatLng(35.66, -80.50), zoom: 8, mapTypeId: google.maps.MapTypeId.ROADMAP }; map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions); // add the markers to the map if they have been loaded already. if (gmarkers.length > 0) { for (var i = 0; i < gmarkers.length; i++) { gmarkers[i].setMap(map); } }}google.maps.event.addDomListener(window, 'load', initialize);
