function validateForm()
{
	var surname = document.getElementById('surname');
	var city = document.getElementById('city');
	var country = document.getElementById('country');
	var telephone = document.getElementById('telephone');
	var email = document.getElementById('email');

	if(isEmpty(trim(surname.value)))
	{
		surname.style.border = '1px solid red';
		var error = true;
	}
	else
	{
		surname.style.border = '1px inset gray';
	}

	if(isEmpty(trim(city.value)))
	{
		document.getElementById('city').style.border = '1px solid red';
		var error = true;
	}
	else
	{
		document.getElementById('city').style.border = '1px inset gray';
	}

	if(isEmpty(trim(country.value)))
	{
		document.getElementById('country').style.border = '1px solid red';
		var error = true;
	}
	else
	{
		document.getElementById('country').style.border = '1px inset gray';
	}

	if(isEmpty(trim(telephone.value)))
	{
		document.getElementById('telephone').style.border = '1px solid red';
		var error = true;
	}
	else
	{
		document.getElementById('telephone').style.border = '1px inset gray';
	}

	if(!isEmail(trim(email.value)))
	{
		document.getElementById('email').style.border = '1px solid red';
		var error = true;
	}
	else
	{
		document.getElementById('email').style.border = '1px inset gray';
	}

	if(error==true)
	{
		return false;
	}
	return true;
}

function isEmpty(field)
{
	if(field==null || field=="")
	{
		return true;
	}
	return false;
}

function isEmail(field)
{
	var atpos=field.indexOf("@");
	var dotpos=field.lastIndexOf(".");
	if(atpos<1 || dotpos<atpos+2 || dotpos+2>=field.length)
	{
		return false;
	}
	return true;
}

function trim(value)
{
	return value.replace(/(^\s+|(\s+$))/g, '');
}