js with translation API, require is not defined, javascript does not work

'use strict';

var http=require('http');
var https=require('https');
varqs=require('querystring');

getAccessToken(function(token){
    translate(token, 'text you want to translate', function(translated){
        console.log(translated);
    });
});

function getAccessToken(callback){
    var body=';
    var request = https.request({
        host: 'datamarket.accesscontrol.windows.net',
        path: '/v2/OAuth2-13',
        method: 'POST'
    }, function(res){
        res.setEncoding('utf8');
        res.on('data', function(chunk){
            body+=chunk;
        }).on('end', function(){
            varresData=JSON.parse(body);
            callback(resData.access_token);
        });
    }).on('error', function(err){
        console.log(err);
    });
    vardata = {
        'client_id': 'String set to client ID',
        'client_secret': 'Customer Secret String',
        'scope': 'http://api.microsofttranslator.com',
        'grant_type': 'client_credentials'
    };

    req.write(qs.stringify(data)));
    req.end();
}

function translate (token, text, callback) {
    var options='appId=Bearer'+token+'&to=en&text='+text+
            '&oncomplete=translated';
    var body=';
    var request = http.request({
        host: 'api.microsofttranslator.com',
        path: '/V2/Ajax.svc/Translate?' + qs.escape(options),
        method: 'GET'
    }, function(res){
        res.setEncoding('utf8');
        res.on('data', function(chunk){
            body+=chunk;
        }).on('end', function(){
            event(body);
        });
    }).on('error', function(err){
        console.log(err);
    });

    req.end();

    function translated(text){
        callback(text);
    }
}

require is not defined