decode

<html>
<head>
<script language="JavaScript" type="text/javascript">
function ConvertShellCode(strdata)
{
var s = new String(strdata);
s = s.replace(/[\s\\x]/g, '');
var strcode = '';

for(var idx=0; idx<s.length; idx+=4)
strcode += "%u" + s.substr(idx+2,2) + s.substr(idx+0,2);

document.forms.ShellToJavascript.decode.value = strcode;
}
</script>
</head>
<body>
<form name="ShellToJavascript" method="post">
<textarea rows="10" cols="100" name="encode"></textarea><br />
<textarea rows="10" cols="100" name="decode"></textarea><br />
<input type="button" value="Encode" onclick="return ConvertShellCode(document.ShellToJavascript.encode.value)" />
</form>
</body>
</html>