diff --git a/loc-chase2.html b/loc-chase2.html
index cc85c26..085ac6a 100644
--- a/loc-chase2.html
+++ b/loc-chase2.html
@@ -4,7 +4,6 @@
   <meta charset="utf-8">
   <title>GNSS宝探し</title>
 
-  <!-- Leaflet（CDN） -->
   <link
     rel="stylesheet"
     href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css"
@@ -14,112 +13,12 @@
     defer
   ></script>
 
-  <!-- 自分のJS -->
-  <script defer>
-    document.addEventListener("DOMContentLoaded", () => {
-      var mymap = L.map("locationmap").setView([38.891, 139.824], 16);
-
-      L.tileLayer("https://{s}.tile.osm.org/{z}/{x}/{y}.png", {
-        attribution:
-          '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
-      }).addTo(mymap);
-
-      var locmarker = L.marker(mymap.getCenter()).addTo(mymap);
-      locmarker.bindPopup("STARTおしてね").openPopup();
-
-      var nTrial = 100;
-      var watchId = null;
-
-      function stopLOC() {
-        if (watchId != null) {
-          navigator.geolocation.clearWatch(watchId);
-          document.getElementById("title").textContent = "stop";
-          locmarker.setPopupContent("停めました");
-        }
-        watchId = null;
-      }
-
-      function tryWatchLOC() {
-        stopLOC();
-        watchId = navigator.geolocation.watchPosition(
-          onSuccess,
-          onError,
-          { maximumAge: 0, timeout: 3000, enableHighAccuracy: true }
-        );
-        document.getElementById("title").textContent = "START!!";
-      }
-
-      // 共通処理
-      function updateLocation(latlng) {
-        mymap.panTo(latlng);
-
-        const goalLat = 38.892;
-        const goalLng = 139.825;
-
-        const dLat = Math.abs(latlng.lat - goalLat);
-        const dLng = Math.abs(latlng.lng - goalLng);
-
-        let message;
-
-        if (dLat < 0.0003 && dLng < 0.0003) {
-          message = "🎉 GOAL!! 宝を見つけました！";
-        } else if (dLat < 0.001 && dLng < 0.001) {
-          message = "おしい！もう少し！";
-        } else {
-          message = "探索中…";
-        }
-
-        locmarker
-          .setLatLng(latlng)
-          .setPopupContent(message)
-          .openPopup();
-      }
-
-      // GPS 成功時
-      function onSuccess(pos) {
-        var latlng = L.latLng(
-          pos.coords.latitude,
-          pos.coords.longitude
-        );
-        updateLocation(latlng);
-      }
-
-      function onError(err) {
-        var restN = "あと" + (--nTrial) + "回試行します。";
-        locmarker.setPopupContent("捕捉失敗:" + restN).openPopup();
-        if (nTrial <= 0) {
-          navigator.geolocation.clearWatch(watchId);
-        }
-      }
-
-      // 地図クリック対応
-      mymap.on("click", function (e) {
-        console.log("クリック:", e.latlng);
-        stopLOC();
-        updateLocation(e.latlng);
-      });
-
-      // スマホタップ対応
-      mymap.on("tap", function (e) {
-        console.log("タップ:", e.latlng);
-        stopLOC();
-        updateLocation(e.latlng);
-      });
-
-      // ボタン設定
-      document.getElementById("start")
-        .addEventListener("click", tryWatchLOC);
-
-      document.getElementById("stop")
-        .addEventListener("click", stopLOC);
-
-    }, false);
-  </script>
+  <script src="loc-chase.js" defer></script>
 
   <style>
     #locationmap {
       width: 90vw;
-      height: 75vw; /* ←元の指定に戻しました */
+      height: 75vw;
       margin: auto;
     }
   </style>
@@ -131,6 +30,7 @@
   <p>
     <button id="start" type="button">START</button>
     <button id="stop" type="button">STOP</button>
+    <a href="loc-chase2.js">src</a>
   </p>
 
   <div id="locationmap"></div>