diff --git a/docs/webframe/javascript/datatype.md b/docs/webframe/javascript/datatype.md
index e2ce175..a212c4f 100644
--- a/docs/webframe/javascript/datatype.md
+++ b/docs/webframe/javascript/datatype.md
@@ -48,7 +48,7 @@ var obj1 = {
    a:1,
    b:2
 }
-console.log('2'+obj1)；
+console.log('2'+obj1);
 
 var obj2 = {
     toString:function(){
@@ -599,4 +599,4 @@ undefined + 1 // NaN
     // null
     console.log(String(undefined));
     // undefined
-    ```
\ No newline at end of file
+    ```