固定侧边蓝的css式样

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1. width:?15px;
2. float:?right;
3. display:?block;
4. position:?fixed;
5. top:?40%;
6. right:?0;
7. _position:?absolute;
8. _margin-top:?300px;
9. _top:?expression(eval(document.documentElement.scrollTop));
10. z-index:?6;