Send Java script variable to a controller

I am trying to build an application that has google maps. Inside the script there are two java script variables. I want to send those two variables using a java function. What is the best why to do that. Could someone give me a simple example on that.

Here is non ajax method(but ajax pretty the same): var f = document.createElement('form'); f.style.display = 'none'; this.parentNode.appendChild(f); f.method = 'POST'; #or get f.action = this.href; var m = document.createElement('input'); m.setAttribute('type', 'hidden'); m.setAttribute('name', '_method'); //m.setAttribute('value', 'delete'); #or put it depends of your needs f.appendChild(m); //Now we can send your variables: var s = document.createElement('input'); s.setAttribute('type', 'hidden'); s.setAttribute('name', 'my_var'); s.setAttribute('value', 'my_var_value'); f.appendChild(s); f.submit();