diff --git a/library/HTMLPurifier/Strategy/RemoveForeignElements.php b/library/HTMLPurifier/Strategy/RemoveForeignElements.php
new file mode 100644
index 00000000..51d73031
--- /dev/null
+++ b/library/HTMLPurifier/Strategy/RemoveForeignElements.php
@@ -0,0 +1,42 @@
+<?php
+
+require_once 'HTMLPurifier/Strategy.php';
+require_once 'HTMLPurifier/Definition.php';
+require_once 'HTMLPurifier/Generator.php';
+
+class HTMLPurifier_Strategy_RemoveForeignElements extends HTMLPurifier_Strategy
+{
+    
+    var $generator;
+    var $definition;
+    
+    function HTMLPurifier_Definition() {
+        $this->generator = new HTMLPurifier_Generator();
+        $this->definition = HTMLPurifier_Definition::instance();
+    }
+    
+    function execute($tokens) {
+        $result = array();
+        foreach($tokens as $token) {
+            if (!empty( $token->is_tag )) {
+                if (!isset($this->definition->info[$token->name])) {
+                    // invalid tag, generate HTML and insert in
+                    $token = new HTMLPurifier_Token_Text(
+                        $this->generator->generateFromToken($token)
+                    );
+                }
+            } elseif ($token->type == 'comment') {
+                // strip comments
+                continue;
+            } elseif ($token->type == 'text') {
+            } else {
+                continue;
+            }
+            $result[] = $token;
+        }
+        return $result;
+    }
+    
+}
+
+?>
\ No newline at end of file