window.onload = function() {
	var form = document.getElementById('contact-form');
	
	if (form)
	{
		form.onsubmit = function() {
			if (form.firstname.value.length == 0)
				alert('Please enter your first name.');
			else if (form.lastname.value.length == 0)
				alert('Please enter your last name.');
			else if (form.mailingaddress.value.length == 0)
				alert('Please enter your mailing address.');
			else if (form.phonenumber.value.length == 0)
				alert('Please enter your phone number.');
			else if (form.emailaddress.value.length == 0)
				alert('Please enter your email address.');
			else if ((form.emailaddress.value.indexOf('@') < 1)
					|| form.emailaddress.value.indexOf('.', form.emailaddress.value.indexOf('@')) < form.emailaddress.value.indexOf('@'))
				alert('Please enter an email address of the proper format.');
			else if (form.message.value.length == 0)
				alert('Please enter a message.');
			else
				return true;
			return false;
		}
	}
}