window.onload = function(){
  set_focus();
  //set_button_enter();
}

function set_focus(){
  if(document.getElementById("password"))
    document.getElementById("password").focus();
}

function set_button_enter(){
  if(document.getElementById("password"))
    if(document.getElementById("password").value == "")
      document.getElementById("enter").disabled = true;
    else
      document.getElementById("enter").disabled = false;
}