added switch for exercise in url

src/components/cards.js

@@ -1107,6 +1107,13 @@ var STWkit;
             self.startDiv.style.display = 'none';
             self.startButton.onclick = function () {
                 self.startButton.disabled = true;
+                var param = STWkit.getURLParams();
+                var exerciseid = STWkit.getParamValue('exercise', param);
+                if (exerciseid) {
+                    STWkit.deleteParam('exercise', param);
+                    param.push(['id', exerciseid]);
+                    window.location.search = STWkit.getSearchUrl(param);
+                }
                 var geojson = {};
                 geojson["type"] = "FeatureCollection";
                 geojson["features"] = [];
@@ -1135,7 +1142,6 @@ var STWkit;
                         AccordionCard.warningMsg("Login", "You need to login to use this function.");
                     },
                     success: function (location) {
-                        var param = STWkit.getURLParams();
                         param.push(['id', location.id]);
                         STWkit.updateUrl(param);
                         self.clear();

src/components/cards.ts

@@ -1227,6 +1227,15 @@ module STWkit {
 
             self.startButton.onclick = () => {
                 self.startButton.disabled = true;
+
+                var param = STWkit.getURLParams();
+                var exerciseid = STWkit.getParamValue('exercise', param);
+                if (exerciseid) {
+                    STWkit.deleteParam('exercise', param);
+                    param.push(['id', exerciseid]);
+                    window.location.search = STWkit.getSearchUrl(param);
+                }
+                
                 var geojson = {};
                 geojson["type"] = "FeatureCollection";
                 geojson["features"] = [];
@@ -1255,7 +1264,6 @@ module STWkit {
                         AccordionCard.warningMsg("Login", "You need to login to use this function.");
                     },
                     success: function (location) {
-                        var param = STWkit.getURLParams();
                         param.push(['id', location.id]);
                         STWkit.updateUrl(param);
                         self.clear();