function checkFormFields2(form){

if (form.username.value == 'username'){
   alert('Please enter your username.');
   form.username.focus();
   return false;
}
if (form.username.value.length == 0){
   alert('Please enter your username.');
   form.username.focus();
   return false;
}

if (form.password.value == 'password'){
   alert('Please enter your password.');
   form.password.focus();
   return false;
}
if (form.password.value.length == 0){
   alert('Please enter your password.');
   form.password.focus();
   return false;
}

return true
}