but it's not working in IE. recommend using :nth-child(2n+1) :nth-child(2n+2)
li {_x000D_
color: black;_x000D_
}_x000D_
li:nth-child(odd) {_x000D_
color: #777;_x000D_
}_x000D_
li:nth-child(even) {_x000D_
color: blue;_x000D_
}
_x000D_
<ul>_x000D_
<li>ho</li>_x000D_
<li>ho</li>_x000D_
<li>ho</li>_x000D_
<li>ho</li>_x000D_
<li>ho</li>_x000D_
</ul>
_x000D_