how to click on element in someones website with javascript(login to outlook.com)

Question

forexample I can go to msn.com and open developer tools and write this code document.querySelector('.news a').click() and it will open news. Now I want a program to do this automatically for me. write a javascript code that do this for me actully this was just a simple example I don't want a program to open news in msn actully I want to submit something automaticaly. 1)how can I do this (I know if want to make this app for desktop I should use something like appjs)? 2)Is there any way that it doesn't open browser and submit that?

update:

I tested casperjs(as mentioned in comments) and I tried to login to my outlook then capture it.

here is my code:

var casper = require('casper').create();
casper.start("https://outlook.com", function(response) {
   this.page.evaluate(function(a,b) {
    // login

      document.querySelector('#i0116').value = a;
      document.querySelector('#i0118').value = b;
      document.querySelector('#idSIButton9').click();
   },'**********@outlook.com','**********');
}).then( function(){
       this.capture('outlook.png');
       this.echo(this.getTitle());
   }).run();

from this and this stackoverflow questions I tried casperjs --ssl-protocol=tlsv1 test.js and casperjs --ssl-protocol=any test.js and .wait(4000, function(){this.capture('outlook.png')} but all of them loged sign in and the below picture

as you see the sign in form is filled but it couldn't enter it.

In the developer tools I entered

      document.querySelector('#i0116').value = a;
      document.querySelector('#i0118').value = b;
      document.querySelector('#idSIButton9').click();

and it worked but here it doesn't work.