function checkLogin()
{
	var err = '';
	user = document.getElementById('username');
	pass = document.getElementById('passwd');

	if (user.value == "" || pass.value=="")
	    err = 'User/Password are empty!\n';
	if (user.length <3)
	    err = 'Invalid Username \n';

	if(err != "")
	{
	    alert(err);
	    return false; 	    
	}

	return true;
}