为什么JavaScript不输出任何内容?它应该输出一些HTML代码。
<html>
<head>
<script type="text/javascript"><!--`
var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
function d64(input) {
var output = new StringMaker();
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
// remove all characters that are not A-Z, a-z, 0-9, +, /, or =
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
while (i < input.length) {
enc1 = keyStr.indexOf(input.charAt(i++));
enc2 = keyStr.indexOf(input.charAt(i++));
enc3 = keyStr.indexOf(input.charAt(i++));
enc4 = keyStr.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
output.append(String.fromCharCode(chr1));
if (enc3 != 64) {
output.append(String.fromCharCode(chr2));
}
if (enc4 != 64) {
output.append(String.fromCharCode(chr3));
}
}
return output.toString();
}
//-->
</script>
</head>
<body>
blah
<script type="text/javascript">document.write(d64("PGEgaHJlZj0ibWFpbHRvOnN0ZXZlbkBtYWlsaW5hdG9yLmNvbSI+c3RldmVuQG1haWxpbmF0b3IuY29tPC9hPg=="));</script><noscript>steven[|at|]mailinator[|dot|]com</noscript>
blah
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@@@@@22</body>
</html>
