--- ReferencedByFilter0.module	Fri Jun 06 00:13:02 2008
+++ ReferencedByFilter.module	Sat Jun 07 03:50:35 2008
@@ -50,21 +50,28 @@ function referencedbyfilter_views_argume
 /** 
  * Handler function for referencedbyfilter_views_arguments().
  */
-function referencedbyfilter_arg_nid($op, &$query, $argtype, $arg = NULL) {
+function referencedbyfilter_arg_nid($op, &$query, $argtype, $arg_s = NULL) {
   switch ($op) {
     case 'filter':
-      $nid = (int)$arg;
-      if (is_int($nid)) {
-      	$node_reference_table = 'content_'. $argtype['options'];
-        $referencing_field = $argtype['options'];
+      $flag=true;
+      $arg_s = preg_split('/[+ ]/', $arg_s);
+      foreach ($arg_s as $arg) {
+        $nid = (int)$arg;
+        if (is_int($nid)) {
+          if($flag){
+  	        $selectStr = ' ';
+            $node_reference_table = 'content_'. $argtype['options'];
+            $referencing_field = $argtype['options'];
+            $flag=false;
+          }
         //Retrieve the referenced nodes.
 	      $node = node_load($nid);
-	      $selectStr = ' ';
 	      foreach ($node->$referencing_field as $referenced) {
 	      	$selectStr .= $referenced['nid']. ',';
 	      }
-	      $query->add_where('node.nid in ('. substr($selectStr,0,-1) . ') ');
+        }
       }
+      $query->add_where('node.nid in ('. substr($selectStr,0,-1) . ') ');
       break;
   }
 }