Index: lams_central/web/main.jsp
===================================================================
diff -u -rdcf01dfa4123ad75233aabacb24e11807f2adbf5 -rb95781db2e9d9e1fc05049dcd87a4454cde63565
--- lams_central/web/main.jsp	(.../main.jsp)	(revision dcf01dfa4123ad75233aabacb24e11807f2adbf5)
+++ lams_central/web/main.jsp	(.../main.jsp)	(revision b95781db2e9d9e1fc05049dcd87a4454cde63565)
@@ -47,7 +47,8 @@
 				
 				function makeSortable(element) {
 					jQuery(element).Sortable({
-						accept: "j-single-lesson", 
+						accept: "j-single-lesson",
+						axis: "vertically",
 						// containment: "parent",
 						onStop: function s() {
 							var ids = [];