for(var c = 0 ; c<11; c++)

{

  var btn = document.createElement('input');

  btn.setAttribute("id", "Campaign "+c);

  btn.type = "button";

  btn.setAttribute("value","Campaign "+c);

  btn.setAttribute("name",c);

  makeFunc(btn, c);

  document.body.appendChild(btn);

}

function makeFunc(btn, c)

{

    btn.addEventListener('click', function(){

       console.log(c);

    });

}