<head> 
<meta charset=utf-8>        
<style type=\"text/css\">            
.box {                
	width: 100px;                
    height: 100px;               
    
    /*补全代码*/              
    position:fixed;             
    left:0px;               
    top:0px;           
    }      
    </style> 
    </head>
    <body> 
    <div class='box'></div> 
    </body>
    </html>","libs":[]}