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<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title></title>
<style>
div {
width:100px;
height:90px;
Float:left;
padding:5px;
margin:5px;
Background-color: #EEEEEE;
}
</style>
<script src= "Http://libs.baidu.com/jquery/1.9.1/jquery.js" ></script>
<body>
<div id= "Aaron" >
<p>id= "Aaron" </p>
<p> Check </p>
</div>
<div id= "Imooc" >
<p>id= "Imooc" </p>
<p>jquery Check </p>
</div>
<div id= "Imooc" >
<p>id= "Imooc" </p>
<p>jquery not selected </p>
</div>
<script type= "Text/javascript" >
Processing by native methods
var div = document.getElementById (' Aaron ');
Div.style.border = "3px solid blue";
</script>
<script type= "Text/javascript" >
Direct incoming ID via jquery
ID only, select to the first matching div node with ID IMOOC
?. CSS ("Border", "3px solid Red");
</script>
</body>
The ID selector of the jquery selector
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