Index: lams_central/web/includes/javascript/dialog.js
===================================================================
RCS file: /usr/local/cvsroot/lams_central/web/includes/javascript/dialog.js,v
diff -u -r1.1.2.23 -r1.1.2.24
--- lams_central/web/includes/javascript/dialog.js	23 Dec 2016 18:19:02 -0000	1.1.2.23
+++ lams_central/web/includes/javascript/dialog.js	23 Dec 2016 18:20:44 -0000	1.1.2.24
@@ -243,6 +243,8 @@
 	            if (draggable) {
 	            	modalDialog.draggable('disable');
 	            }
+	            //enable scrolling of the parent's content
+	            dialog.parent().removeClass("modal-open");		        	
 	        };
 	    });
 	    
@@ -270,6 +272,8 @@
     	var modalDialog = $('.modal-dialog', dialog);
     	modalDialog.draggable('enable');
     }
+    //disable scrolling of the parent's content
+    dialog.parent().addClass("modal-open");
 }
 
 /**