jQuery Grid Plugin - jqGrid

if you have xml with the following structure:

<stuff>
  <item id="123">
    <foo>
    <bar>
  </item>
  ...
</stuff>

it is not possible to include a column that displays the id attribute.

As far as I can tell the current xmlmap paramter only allows to point to
elements. The attached patch allows to use xmlmap="@id" to get the
attribute value.
This is enough for the cases I encountered, I am not sure how to
implement something more generic... maybe allow to specify a function
that is passed the current row element as a param?

diff --git a/js/grid.base.js b/js/grid.base.js
index 11a465a..07c6a52 100644
--- a/js/grid.base.js
+++ b/js/grid.base.js
@@ -396,7 +396,11 @@ $.fn.jqGrid = function( p ) {
                                        });
                                } else {
                                        for(i = 0; i < f.length;i++) {
-                                               v = $(f[i],xmlr).text();
+                                               if('@' == f[i].charAt(0)) {
+                                                       v = xmlr.getAttribute(f[i].substring(1));
+                                               } else {
+                                                       v = $(f[i],xmlr).text();
+                                               }
                                                rd[ts.p.colModel[i+gi+si+ni].name] = v;
                                                rowData[ari++] = addCell(rid, v, i+gi+si+ni, j+rcnt, xmlr);
                                        }