Redireccionar página enviando parámetros post

relocate.js

function relocate(page,params){
  
  var body = document.body;
  
  form=document.createElement('form');

  form.method = 'POST';
  form.action = page;
  form.name = 'jsform';

  for (index in params){
    var input = document.createElement('input');
    input.type='hidden';
    input.name=index;
    input.id=index;
    input.value=params[index];
    form.appendChild(input);
  }

  body.appendChild(form);
  form.submit();
}