更新GDownloadUrl（）

Question

我正在使用帶有標記的Google地圖，並且我在地圖上方有一個搜索表單。我試圖讓onchange更新GDownloadUrl（），從而縮小加載在頁面上的標記。

這是我曾嘗試：

<script type="text/javascript"> 
      function load() { 
       if (GBrowserIsCompatible()) { 
        var map = new GMap2(document.getElementById("map")); 
        map.addControl(new GSmallMapControl()); 
        map.addControl(new GMapTypeControl()); 
        map.setCenter(new GLatLng(38.85682, -96.943359), 4); 
        var selector = document.getElementById("sport"); 
var url = "url here ?sport="+selector.options[selector.selectedIndex].value+""; 
        GDownloadUrl(url, function(data) { 
         var xml = GXml.parse(data); 
         var markers = xml.documentElement.getElementsByTagName("marker"); 
         for (var i = 0; i < markers.length; i++) { 
          var name = markers[i].getAttribute("name"); 
          var address = markers[i].getAttribute("address"); 
          var type = markers[i].getAttribute("type"); 
          var title = markers[i].getAttribute("title"); 
          var id = markers[i].getAttribute("id"); 
          var point = new GLatLng(parseFloat(markers[i].getAttribute("lat")), 
          parseFloat(markers[i].getAttribute("lng"))); 
          var marker = createMarker(point, name, address, type, title, id); 
          map.addOverlay(marker); 
         } 
        }); 
       } 
      } 
      </script> 

頁面鏈接：http://michaelstevens.dyndns.org/athletenation/index.php?option=com_athletenation&view=Events&Itemid=3

Answer 1

我想通了，這是很容易，一旦我向後退了一步，想着什麼，我試圖做：

function changeme(){ 

    var map; //clears current icons 

//get the value of each input: 
var e = document.getElementById("sport"); 
var strUser = e.options[e.selectedIndex].value; 

var event = document.getElementById("event"); 
var strUserevent = event.options[event.selectedIndex].value; 

var price = document.getElementById("price"); 
var strUserprice = price.options[price.selectedIndex].value; 

var miles = document.getElementById("miles"); 
var strUsermiles = miles.options[miles.selectedIndex].value; 

var zip = document.getElementById("zip"); 
var strUserzip = document.getElementById('zip').value; 

    xmlurlsport = "?sport="+ strUser +""; 
    xmlurlevent = "&event="+ strUserevent +""; 
    xmlurlprice = "&price="+ strUserprice +""; 
    xmlurlmiles = "&miles="+ strUsermiles +""; 
    xmlurlzip = "&zip="+ strUserzip +""; 

var xmlurl = " url here "+xmlurlsport+""+xmlurlevent+""+xmlurlprice+""+xmlurlmiles+""+xmlurlzip+""; 


        var map = new GMap2(document.getElementById("map")); 
        map.addControl(new GSmallMapControl()); 
        map.addControl(new GMapTypeControl()); 
        map.setCenter(new GLatLng(38.85682, -96.943359), 4); 


        GDownloadUrl(xmlurl, function(data) { 
         var xml = GXml.parse(data); 
         var markers = xml.documentElement.getElementsByTagName("marker"); 
         for (var i = 0; i < markers.length; i++) { 
          var name = markers[i].getAttribute("name"); 
          var address = markers[i].getAttribute("address"); 
          var type = markers[i].getAttribute("type"); 
          var title = markers[i].getAttribute("title"); 
          var id = markers[i].getAttribute("id"); 
          var point = new GLatLng(parseFloat(markers[i].getAttribute("lat")), 
          parseFloat(markers[i].getAttribute("lng"))); 
          var marker = createMarker(point, name, address, type, title, id); 
          map.addOverlay(marker); 
         } 
        }); 




alert(xmlurl); 

}