diff --git a/inc/inc.ClassSession.php b/inc/inc.ClassSession.php
index a9940d938..e1f1c1b8e 100644
--- a/inc/inc.ClassSession.php
+++ b/inc/inc.ClassSession.php
@@ -286,6 +286,24 @@ class SeedDMS_Session {
 		return (array) $this->data['clipboard'];
 	} /* }}} */
 
+	/**
+	 * Check if object is on clipboard
+	 *
+	 * @param object $object Document or folder
+	 */
+	function isOnClipboard($object) { /* {{{ */
+		/* id is only set if load() was called before */
+		if($this->id) {
+			$dms = $object->getDMS();
+			if($object->isType('document')) {
+				return in_array($object->getID(), $this->data['clipboard']['docs']);
+			} elseif($object->isType('folder')) {
+				return in_array($object->getID(), $this->data['clipboard']['folders']);
+			}
+		}
+		return false;
+	} /* }}} */
+
 	/**
 	 * Add to clipboard of session
 	 *