files count by js

files_count.js

function getDirectoryFilesCount(path) {
    var fd = new ActiveXObject("Scripting.FileSystemObject");
    var d;
    var ret;

    try {
        d = fd.GetFolder(path);
        ret = d.Files.Count;
    } catch(e) {
        ret = "-1";
    }
    d = null;
    fd = null;
    return ret;
}

var arg = WScript.arguments;
if (arg.length!=1) {
    WScript.echo("-1");
} else {
    WScript.echo(getDirectoryFilesCount(arg(0)));
}
arg = null;