framest有一部分显示空白


<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>搜索结果页面</title>
</head>
    <frameset rows="15%,*" frameborder=0>    <!--把页面分成上下两部分,上部分占15%,下部分*表示占据其余部分-->
        <frame src="置顶.html" name="top"></frame><!--上半部分要显示的页面-->
        <frameset cols="20%,*"><!--把页面分成左右两部分,左部分占15%,右部分*表示占据其余部分-->
            <frame src="分选框.html" name="left"></frame><!--做半部分要显示的页面-->
            <frame src="基本信息页面.html" name="right"></frame><!--右半部分要显示的页面-->
        </frameset>
    </frameset><noframes></noframes>
</html>
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Author URL: http://w3layouts.com
License: Creative Commons Attribution 3.0 Unported
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<!DOCTYPE HTML>
<html>
<head>
<title>分选框</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="keywords" content="Novus Admin Panel Responsive web template, Bootstrap Web Templates, Flat Web Templates, Android Compatible web template, 
SmartPhone Compatible web template, free WebDesigns for Nokia, Samsung, LG, SonyEricsson, Motorola web design" />
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<!-- Bootstrap Core CSS -->
<link href="3/css/bootstrap.css" rel='stylesheet' type='text/css' />
<!-- Custom CSS -->
<link href="3/css/style.css" rel='stylesheet' type='text/css' />
<!-- font CSS -->
<!-- font-awesome icons -->
<link href="3/css/font-awesome.css" rel="stylesheet"> 
<!-- //font-awesome icons -->

</head> 
<body class="cbp-spmenu-push">
    <div class="main-content">
        <!--left-fixed -navigation-->
        <div class=" sidebar" role="navigation">
            <div class="navbar-collapse">
                <nav class="cbp-spmenu cbp-spmenu-vertical cbp-spmenu-left" id="cbp-spmenu-s1">
                    <ul class="nav" id="side-menu">
                        <li>
                            <a href="index.html" class="active"><i class="fa fa-home nav_icon"></i>Dashboard</a>
                        </li>
                        
                        <li>
                            <a href="widgets.html"><i class="fa fa-th-large nav_icon"></i>Widgets <span class="nav-badge-btm">08</span></a>
                        </li>
                        
                        <li>
                            <a href="tables.html"><i class="fa fa-table nav_icon"></i>Tables <span class="nav-badge">05</span></a>
                        </li>
                    </ul>
                    <!-- //sidebar-collapse -->
                </nav>
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        <!--left-fixed -navigation-->
        <!-- header-starts -->
        
        <!-- //header-ends -->
        <!-- main content start-->
        
        <!--footer-->
        
        <!--//footer-->
    </div>
</body>
</html>

上面的运行之后下面的分选框.html不显示,其他两个页面正常,换浏览器没用