function check() {

	var nf = document.getElementById('f[nf]');
	nf.className='';
	if (nf.value.length<3) nf.className='wrong';

	var nl = document.getElementById('f[nl]');
	nl.className='';
	if (nl.value.length<3) nl.className='wrong';

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

	var phone = document.getElementById('f[phone]');
	phone.className='';
	if (phone.value.length<7) phone.className='wrong';

	if (nf.className=='wrong' || nl.className=='wrong' || email.className=='wrong' || phone.className=='wrong')
		{
		return false;
		}

}