function validateForm() {
	var error_found=false;
	if (document.contact_form.first_name.value=='') {
	document.getElementById('first_name_error').style.display='';
	document.getElementById('first_name').className='error';
	error_found=true;
	} else {
	document.getElementById('first_name_error').style.display='none';
	document.getElementById('first_name').className='text';
	}
	if (document.contact_form.last_name.value=='') {
	document.getElementById('last_name_error').style.display='';
	document.getElementById('last_name').className='error';
	error_found=true;
	} else {
	document.getElementById('last_name_error').style.display='none';
	document.getElementById('last_name').className='text';
	}
	if (document.contact_form.email.value=='') {
	document.getElementById('email_error').style.display='';
	document.getElementById('email').className='error';
	error_found=true;
	} else {
	document.getElementById('email_error').style.display='none';
	document.getElementById('email').className='text';
	}
	if (document.contact_form.subject.options[document.contact_form.subject.selectedIndex].value=='none') {
	document.getElementById('subject_error').style.display='';
	document.getElementById('subject').className='error';
	error_found=true;
	} else {
	document.getElementById('subject_error').style.display='none';
	document.getElementById('subject').className='text';
	}
	if (document.contact_form.message.value=='') {
	document.getElementById('message_error').style.display='';
	document.getElementById('message').className='error';
	error_found=true;
	} else {
	document.getElementById('message_error').style.display='none';
	document.getElementById('message').className='text';
	}
	if (document.contact_form.captcha.value=='') {
	document.getElementById('captcha_error').style.display='';
	document.getElementById('captcha').className='error';
	error_found=true;
	} else {
	document.getElementById('captcha_error').style.display='none';
	document.getElementById('captcha').className='text';
	}
	if (error_found) {
	return false;
	} else {
	return true;
	}
}