--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/presen/fig/tgraph/assets/idrviewer.querystring-navigation.js	Mon Feb 18 19:46:14 2019 +0900
@@ -0,0 +1,61 @@
+/* v1.2.0 */
+(function() {
+    "use strict";
+
+    var getURLParamValue = function(param) {
+        var url = document.URL;
+        var jumIdx = url.toString().indexOf('?');
+        var params = (jumIdx != -1) ? url.substr(jumIdx + 1).split("&") : "";
+        for (var i = 0; i < params.length; i++) {
+            params[i] = params[i].split('=');
+            if (params[i][0] == param) {
+                return params[i][1];
+            }
+        }
+        return "";
+    };
+
+    var layout;
+    var handlePageChange = function(data) {
+        if (history.pushState) {
+            if (layout === IDRViewer.LAYOUT_CONTINUOUS) {
+                try {
+                    history.replaceState({page: data.page}, null, '?page=' + data.page);
+                } catch (ignore) { } // Chrome throws error on file:// protocol
+            } else {
+                try {
+                    history.pushState({page: data.page}, null, '?page=' + data.page);
+                } catch (ignore) { } // Chrome throws error on file:// protocol
+            }
+        }
+    };
+
+    var pg = parseInt(getURLParamValue('page'));
+    if (isNaN(pg)) {
+        pg = 1;
+    }
+    IDRViewer.goToPage(pg);
+
+    if (history.pushState) {
+        IDRViewer.on('ready', function (data) {
+            layout = data.layout;
+
+            try {
+                history.replaceState({page: data.page}, null, '?page=' + data.page);
+            } catch (ignore) { } // Chrome throws error on file:// protocol
+
+            window.onpopstate = function (event) {
+                IDRViewer.off('pagechange', handlePageChange);
+                IDRViewer.goToPage(event.state.page);
+                IDRViewer.on('pagechange', handlePageChange);
+            };
+
+            IDRViewer.on('pagechange', handlePageChange);
+
+            IDRViewer.on('layoutchange', function (data) {
+                layout = data.layout;
+            });
+        });
+    }
+
+})();
\ No newline at end of file