app.post('/room', function(req, res){
  res.render('est.ejs', {
    title: 'Sy',
    user: req.body.alias
  });
});

//est.ejs
<script type="text/javascript">
Sys(<%= user %>);
</script>

//
function Sys(user) {
$(document).ready(function() {
	alert(user); //Uncaught ReferenceError: Test is not defined
                     //Test is what I input inside the form