/**
	Funcao que 
*/
function callServer(action) {
  var head = document.getElementsByTagName('head').item(0);
  var old  = document.getElementById('lastLoadedCmds');
  if (old) head.removeChild(old);
  
  script = document.createElement('script');
  script.src = action;
  script.type = 'text/javascript';
  script.defer = true;
  script.id = 'lastLoadedCmds';
  void(head.appendChild(script));
}