calling child_process from nodejs

I'm having an html file with a hyperlink which calls javascript function.The javascript function has to call a batch file...this all should happen from Node.js

<html>
<head>
<title>sample</title>
<script src="child.js"></script>
</head>
<body>
<a href="#" onclick="call()">click here</a>
</body>
</html>

child.js

function call()
{

var spawn = require('child_process').spawn,
ls = spawn('append.bat');
}

I'm getting error like this....

ReferenceError: require is not defined
var spawn = require('child_process').spawn,

any answer..pls reply...

You can't access Node.js from browser.

Node.js is a server-side environment for JavaScript. To interact with it from a web page, you'll want to establish an http.Server and use Ajax to communicate between.

A partial example (using a few libraries to simplify) would be:

// server-side
app.post('/append', function (req, res) {
    exec('appand.bat', function (err, stdout, stderr) {
        if (err || stderr.length) {
            res.send(500, arguments);
        } else {
            res.send(stdout);
        }
    });
});

// client-side
function call() {
    $.post('/append').done(function (ls) {
        console.log(ls);
    }).fail(function (xhr) {
        console.error(xhr.responseText);
    });
}

The libraries demonstrated are Express for server-side and jQuery for client-side. It also uses child_process.exec() rather than spawn() to get Buffers rather than Streams.

Resources: