<!doctype html>
<html >
    <head>
        <meta charset="utf-8">
        <link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
    </head>
    <body>
    <div class="container">
    <br/>
	    <div class="input-group">
	    	<input type="text" class="form-control"/>
	    	<span class="input-group-addon">@qq.com</span>
	    </div>
	    
    </div>
    </body>
    
</html>

原文:http://www.cnblogs.com/qiyc/p/6021156.html