Event.observe(window, 'load', loginLoadEventHandler, false);

function loginLoadEventHandler(event){
  	var rb = $('register-btn');
	var lb = $('login-btn');
	
	Event.observe( rb, 'click', registerButtonClickHandler );
	rb.writeAttribute('href','#');
	
	Event.observe( lb, 'click', loginButtonClickHandler );
	lb.writeAttribute('href','#');
}

function registerButtonClickHandler() { 
	$("login").className		= 'hidden';
	$("registration").className	= 'normal';
}

function loginButtonClickHandler() { 
	$("login").className		= 'normal';
	$("registration").className	= 'hidden';
}