function check() {

	var nf = document.getElementById('firstname');
	nf.className='';
	if (nf.value.length<3) nf.className='wrclass';

	var nl = document.getElementById('lastname');
	nl.className='';
	if (nl.value.length<3) nl.className='wrclass';

	var email = document.getElementById('email');
	email.className='';
    checkEmail = email.value;
    if ((checkEmail.indexOf('@') < 0) || ((checkEmail.charAt(checkEmail.length-4) != '.') && (checkEmail.charAt(checkEmail.length-3) != '.'))) email.className='wrclass';

	var phone = document.getElementById('phone');
	phone.className='';
	if (phone.value.length<7) phone.className='wrclass';

	var rb = document.getElementById('rb');
	rb.className='';
	if (rb.value != '123') rb.className='wrclass';
	
	var rb = document.getElementById('rb');
	rb.className='';
	if (rb.value != '123') rb.className='wrclass';

	
	if (rb.className=='wrclass' || nf.className=='wrclass' || nl.className=='wrclass' || email.className=='wrclass' || phone.className=='wrclass' || rb.className=='wrclass')
		{
		alert("Please check required fields");
		return false;
		}

	if (document.getElementById('nights1').value.length < 1 && document.getElementById('nights2').value.length < 1 && document.getElementById('nights3').value.length < 1)
		{
		alert("Please fill at least one option of the Room request");
		return false;
		}

}