Update '12/dragable.js'

12/dragable.js

@@ -72,8 +72,8 @@ makeDragable('#shell_03header', '#shell_03')
 
   /*sets offset parameters and starts listening for mouse-move*/
   function startDrag2(x) {
-    e.preventDefault();
+    x.preventDefault();
-    e.stopPropagation();
+    x.stopPropagation();
     dragObj2 = document.querySelector(dragTarget);
     dragObj2.style.position = "absolute";
     let rect = dragObj2.getBoundingClientRect();