<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style type="text/css">
ul{
width:100px;
margin:10px auto;
}
li{
height:30px;
background-color:#0d638f;
padding:1px;
margin:1px 0;
line-height:30px;
text-align: center;
color:#f0ad4e;
}
li:hover{
cursor:pointer;
}
</style>
<script type="text/javascript" src="../js/jquery-1.7.2.min.js"></script>
<script type="text/javascript" src="../js/jquery-2.0.0.min.js"></script>
</head>
<body>
<ul id="ulTest">
<li>我是第一个</li>
<li>我是第二个</li>
<li>我是第三个</li>
<li>我是第四个</li>
</ul>
<script type="text/javascript">
/*$(function(){
$("li").bind("mouseover",function(){
$(this).css("background-color","#fffccc")
});
$("li").bind("mouseout",function(){
$(this).css("background-color","#0d638f");
});
})*/
$(function(){
var oldcolor="#0d638f";
$.extend({
"focuse":function(obj,color){
$(obj).mouseover(function(){$(this).css("background",color)});
$(obj).mouseout(function(){$(this).css("background",oldcolor)});
}
});
});
$(function(){
$.focuse($("li"),"blue")
})
</script>
</body>
</html>用来拓展对象的，前面的课讲过
自定义想要的插件啊