docs(elements): fix a wangdoc#104

ruanyf · ruanyf · commit 7d27439d5901 · 2019-03-13T13:50:14.000+08:00
diff --git a/docs/elements/a.md b/docs/elements/a.md
@@ -46,7 +46,7 @@ a.username // "user"
 ```javascript
 // HTML 代码如下
 // <a id="test" href="http://example.com">test</a>
-var a = document.getElementById('a');
+var a = document.getElementById('test');
 a.accessKey = 'k';
 ```
 
