<!DOCTYPE html> <html> <head> <title>Remove Markers</title> <style> html, body, #map-canvas { height: 100%; margin: 0px; padding: 0px } #panel { position: absolute; top: 5px; left: 50%; margin-left: -180px; z-index: 5; background-color: #fff; padding: 5px; border: 1px solid #999; } </style> <script src="https://maps.googleapis.com/maps/api/js?v=3.exp"></script> <script> // In the following example, markers appear when the user clicks on the map. // The markers are stored in an array. // The user can then click an option to hide, show or delete the markers. var map; var markers = []; function initialize() { var haightAshbury = new google.maps.LatLng(37.7699298, -122.4469157); var mapOptions = { zoom: 12, center: haightAshbury, mapTypeId: google.maps.MapTypeId.TERRAIN }; map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions); // This event listener will call addMarker() when the map is clicked. google.maps.event.addListener(map, 'click', function(event) { addMarker(event.latLng); }); // Adds a marker at the center of the map. } // Add a marker to the map and push to the array. function addMarker(location) { var marker = new google.maps.Marker({ position: location, map: map }); markers.push(marker); } // Sets the map on all markers in the array. function setAllMap(map) { for (var i = 0; i < markers.length; i++) { markers[i].setMap(map); } } // Removes the markers from the map, but keeps them in the array. function clearMarkers() { setAllMap(null); } // Shows any markers currently in the array. function showMarkers() { setAllMap(map); } // Deletes all markers in the array by removing references to them. function deleteMarkers() { clearMarkers(); markers = []; } google.maps.event.addDomListener(window, 'load', initialize); </script> </head> <body> <div id="panel"> <input onclick="clearMarkers();" type=button value="Hide Markers"> <input onclick="showMarkers();" type=button value="Show All Markers"> <input onclick="deleteMarkers();" type=button value="Delete Markers"> </div> <div id="map-canvas"></div> <p>Click on the map to add markers.</p> </body> </html>
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