<script>
$(function(){
var arr=["red","skyblue","yellow"];
$("li").each(function(i,dom){ // 遍历 each(function(index,domEle))
$(dom).css("color",arr[i]);
})
})
</script>
</head>
<body>
<ul>
<li>第一行</li>
<li>第二行</li>
<li>第三行</li>
</ul>
</body>