索引值是:0——6
<script type="text/javascript" src="jquery-1.7.2.min.js"></script>
<script type="text/javascript">
$(function(){
$("tr:even").css("background-color","yellow");
})
</script>
奇数行有颜色:
<script type="text/javascript">
$(function(){
$("tr:odd").css("background-color","yellow");
})
</script>