function empty(fld , err)
{
	if (fld == '')
	{
		return err + "\n";
	}
	else
	{
		return '';
	}
}

function chk_box(fld , err	)
{
	if (fld == false)
	{
		return err + "\n";
	}
	else
	{
		return '';	
	}
}
function valid_form()
{
	var err_str = '';
	var users_first_name = document.getElementById('users_first_name').value;
	var users_last_name = document.getElementById('users_last_name').value;
	var users_street = document.getElementById('users_street').value;
	var users_house_number = document.getElementById('users_house_number').value;
	var users_house_letter = document.getElementById('users_house_letter').value;
	var users_post_code = document.getElementById('users_post_code').value;
	var users_city = document.getElementById('users_city').value;
	var trmssrv = document.getElementById('terms_of_serivce').checked;
	
	err_str += empty(users_first_name , 'Voornaam');
	err_str += empty(users_last_name , 'Achternaam');
	err_str += empty(users_street , 'Straat');
	err_str += empty(users_house_number , 'Huisnummer');
	err_str += empty(users_post_code , 'Postcode');
	err_str += empty(users_city , 'Stad');
	err_str += chk_box(trmssrv , 'Gaat u akkoord met de algemene voorwaarden');
	
	
	if(err_str == '')
	{
		document.getElementById('preloader').style.display = 'block';
		document.getElementById('cmp_first_name').innerHTML = users_first_name;
		document.getElementById('cmp_last_name').innerHTML = users_last_name;
		document.getElementById('cmp_street').innerHTML = users_street;
		document.getElementById('cmp_house_number').innerHTML = users_house_number;
		document.getElementById('cmp_house_letter').innerHTML = users_house_letter;
		document.getElementById('cmp_post_code').innerHTML = users_post_code;
		document.getElementById('cmp_city').innerHTML = users_city;
		document.getElementById('overlay_div').style.display = 'block';
	}
	else
	{
		alert(err_str);
	}

}

function submit_form()
{
	document.getElementById('app_data').submit();
}

function no_but(what)
{
		document.getElementById(what).style.display = 'none';
		document.getElementById('preloader').style.display = 'none';
		if (what == 'overlay_div_office')
		{
			document.getElementById('users_birth_day').style.display = '';
			document.getElementById('users_birth_month').style.display = '';
			document.getElementById('users_birth_year').style.display = '';				
		}
}

function empty_select(fld , err)
{
	if (fld == 0)
	{
		return err+"\n";
	}
	else
	{
		return '';
	}
}

function valid_form_office()
{
	var err_str = '';
	var users_first_name = document.getElementById('users_first_name').value;
	var users_last_name = document.getElementById('users_last_name').value;
	var users_birth_day = document.getElementById('users_birth_day').value;
	var users_birth_month = document.getElementById('users_birth_month').value;
	var users_birth_year = document.getElementById('users_birth_year').value;
	var trmssrv = document.getElementById('terms_of_serivce').checked;
	
	err_str += empty(users_first_name , 'Voornaam');
	err_str += empty(users_last_name , 'Achternaam');
	err_str += empty_select(users_birth_day , 'Geboortedag')
	err_str += empty_select(users_birth_month , 'Geboortemaand')
	err_str += empty_select(users_birth_year , 'Geboortejaar')
	err_str += chk_box(trmssrv , 'Gaat u akkoord met de algemene voorwaarden');

	if(err_str == '')
	{
		
		document.getElementById('users_birth_day').style.display = 'none';
		document.getElementById('users_birth_month').style.display = 'none';
		document.getElementById('users_birth_year').style.display = 'none';				
		document.getElementById('preloader').style.display = 'block';
		
		document.getElementById('cmp_first_name').innerHTML = users_first_name;
		document.getElementById('cmp_last_name').innerHTML = users_last_name;
		document.getElementById('cmp_date_of_birth').innerHTML = users_birth_day + ' - '+ users_birth_month + ' - ' + users_birth_year;
		document.getElementById('overlay_div_office').style.display = 'block';
	}
	else
	{
		alert(err_str);
	}
	
	
}