JavaScript实现文本倒转

17-12-12 13:22 字数 165 阅读 2868 已编辑

<!DOCTYPE html>        
<html lang="en">        
<head>        
    <meta charset="UTF-8">        
    <title>Document</title>        
</head>        
<body>        

</body>        
</html>        
<script>        
    var str = ('123456789');        
    var nstr = "";        
    var a;        
    for (var i = 0; i < str.length+1; i++) {        
        console.log(a = str.substring(str.length-i,str.length-i+1));        
            nstr +=a;        
    };        
    document.write(nstr);        
</script>

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