diff --git a/lib/client/dom.js b/lib/client/dom.js
index 487e1cff..047fb30c 100644
--- a/lib/client/dom.js
+++ b/lib/client/dom.js
@@ -238,8 +238,8 @@ var CloudCmd, Util, DOM, CloudFunc, Dialog;
              * @param pClass - className
              * @param element - element
              */
-            this.getByClass             = function(pClass, element) {
-                var element = element || document,
+            this.getByClass             = function(pClass, elementParam) {
+                var element = elementParam || document,
                     ret     = this.getByClassAll(pClass, element)[0];
                 
                 return ret;