字符上下半截的高亮显示

css:

                .half{display:inline-block;}

.half_in{height:12px;background-color:#fff; position:absolute; overflow:hidden;}

.half_top .half_in,.half_bot{color:#f30;}

.half_bot .half_in{color:#333;}

 html:

               <span class="half half_top"><span class="half_in">来</span>来</span>

               <span class="half half_bot"><span class="half_in">来</span>来</span>