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我是jquery mobile的新手。我正在執行附加的代碼。我有錨定標記，其角色是按鈕，並附加數據圖標作爲箭頭r，但它不能正常顯示，因爲我expect.please幫助。 箭頭圖標顯示這樣 
data-icon無法正常顯示
，但我預計將顯示這樣 我預計將顯示這樣
我缺少CDN？請幫助。
<!DOCTYPE html>
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<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.css">
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.css">
<script src="http://code.jquery.com/jquery-1.11.3.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.js"></script>
<script src="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.js"></script>
<link rel="stylesheet" type="text/css" href="css/index.css" />
<title>Hello World</title>
<style type="text/css">
.custom-btn{
width:200px !important;;
height: 50px !important;;
}
#btn1{
height: 8px;
}
</style>
</head>
<body>
<div id="home" data-role="page">
<div data-role="header">
<h1 class="head">home</h1>
<a href="blog.html" data-role="button" data-icon="home" style="height:8px;width:50px">Blog</a>
<a href="index.html" data-role="button" data-icon="arrow-r" style="height:8px;width:50px">Home</a>
</div>
<p>Welcome to the view source app</p>
<!-- <div data-role="controlgroup"> -->
<a href="blog.html" data-transition="flip" data-role="button" data-mini="true" data-icon="arrow-r">Blog</a>
<a href="#videos" data-transition="flip" data-role="button" data-mini="true" data-icon="arrow-r">Videos</a>
<a href="#Photos" data-transition="flip" data-role="button" data-mini="true" data-icon="arrow-r">Photos</a>
<a href="#Tweets" data-transition="flip" data-role="button" data-mini="true" data-icon="arrow-r">Tweets</a><!--
</div> -->
</div>
<div data-role="page" id="videos" data-title="View Source:Videos">
<div data-role="header">
<h1>Videos</h1>
<a href="#home" data-transition="flip" data-role="button" data-mini="true" data-icon="arrow-r" style="height:8px;width:50px">Videos</a>
</div>
<p>Videos page</p>
<a href="blog.html" data-transition="pop">Home</a>
</div>
<div id="Photos" data-role="page" data-title="View Source:Photos">
<div data-role="header">
<h1>Photos</h1>
<a href="#home" data-transition="flip" data-role="button" data-mini="true" data-icon="arrow-r" style="height:8px;width:75px">Photos</a>
</div>
<p>Photos page</p>
<a href="blog.html" data-transition="pop">Home</a>
</div>
<div id="Tweets" data-role="page" data-title="View Source:Blog">
<div data-role="header">
<h1>Tweets</h1>
<a href="#home" data-transition="flip" data-role="button" data-mini="true" data-icon="arrow-r" style="height:8px;width:50px">Home</a>
</div>
<p>Tweets</p>
<a href="blog.html" data-transition="pop">Home</a>
</div>
<!-- Start of first page: #one -->
</body>
</html>