background:url has wrong highlight

```
  background url(https//i.alipayobjects.com/e/201212/1lQGjbXvTQ.png) no-repeat 0 -1786px
```

![ 2013-01-15 9 18 29](https://f.cloud.github.com/assets/360661/67743/174f6846-5f16-11e2-9f5a-5a5e0418d480.png)