Improve rcube_find_object() performance by prefering getElementById() as this is the most common case

program/js/common.js

@@ -472,12 +472,16 @@ function urlencode(str)
 function rcube_find_object(id, d)
 {
   var n, f, obj, e;
+
   if (!d) d = document;
 
-  if(d.getElementsByName && (e = d.getElementsByName(id)))
+  if (d.getElementById)
+    if (obj = d.getElementById(id))
+      return obj;
+
+  if (!obj && d.getElementsByName && (e = d.getElementsByName(id)))
     obj = e[0];
-  if(!obj && d.getElementById)
-    obj = d.getElementById(id);
+
   if (!obj && d.all)
     obj = d.all[id];
 
@@ -494,7 +498,8 @@ function rcube_find_object(id, d)
   }
 
   if (!obj && d.layers) {
-    if (d.layers[id]) obj = d.layers[id];
+    if (d.layers[id])
+      obj = d.layers[id];
     for (n=0; !obj && n<d.layers.length; n++)
       obj = rcube_find_object(id, d.layers[n].document);
   }