diff --git a/index.html b/index.html
index 7f4c2a7..03cc2dd 100644
--- a/index.html
+++ b/index.html
@@ -332,7 +332,7 @@
         var w = 19, unit=18;
         var path = document.createElementNS("http://www.w3.org/2000/svg", "path");
 
-        cht.locktoggle = true;
+        cht.locktoggle = null;
         path.setAttribute("stroke", color);
         path.setAttribute("stroke-width", 4);
         path.setAttribute("fill", "none");
@@ -344,17 +344,17 @@
 
         svg = document.getElementById(idgroup);
         svg.appendChild(path);
-        path.addEventListener("mouseenter", function(){if(cht.locktoggle){
+        path.addEventListener("mouseenter", function(){if(!cht.locktoggle){
                                      emphasize(cht, from,  to);path.setAttribute("stroke-width", 10);}});
-        path.addEventListener("mouseleave", function(){if(cht.locktoggle){
+        path.addEventListener("mouseleave", function(){if(!cht.locktoggle){
                                      emphasize(cht, from, -to);path.setAttribute("stroke-width", 4);}});
-        path.addEventListener("click", function(){
-                                     if (cht.locktoggle) {
-                                         path.setAttribute("stroke-width", 14);
-                                         cht.locktoggle = false;
-                                     } else {
+        path.addEventListener("click", function(e){
+                                     if (cht.locktoggle == e.target) {
                                          path.setAttribute("stroke-width", 10);
-                                         cht.locktoggle = true;
+                                         cht.locktoggle = null;
+                                     } else if (!cht.locktoggle){
+                                         path.setAttribute("stroke-width", 14);
+                                         cht.locktoggle = e.target;
                                      }});
     }