try fixing drag to move

contrib/js/backlink.js

@@ -263,10 +263,11 @@ function init(prefix) {
   var e = rpl.elem;
   e.setAttribute("draggable", "true");
   e.ondragend = function(ev) {
-    console.log(ev);
     var el = document.getElementById("postform_container");
     el.style.top = "" + ev.y;
     el.style.left = "" + ev.x;
+    console.log(el);
+    ev.preventDefault();
   }
 }