function highlight(block) {
	
	var input_login = document.getElementById('login');
	var input_passwd = document.getElementById('passwd');
								
	if (block) {
		switch(block) {
			case 'login-block': 
					input_login.className = 'form-text-active';
				break;
			
			case 'passwd-block':
					input_passwd.className = 'form-text-active';
				break;
		}		
	}
	else {
		input_passwd.className = 'form-text';
		input_login.className = 'form-text';
	}
}