请参考如下示例:

1. Overline(上划线) <SPAN >Overline</SPAN>

2. Line-through(中划线) <SPAN >Line-through</SPAN>

3. Underline(上划线) <SPAN >Underline</SPAN>

 

转自:http://constforce.blog.163.com/blog/static/1638812352010112133129446/