function emailCheck(el) {

	var emailStr = el;

	var emailPat = /^[\'_\.0-9A-Za-z-]+@([0-9A-Za-z-]+[0-9A-Za-z-\.]+)\.([A-Za-z]){2,4}$/;

	var email = emailStr.toLowerCase();

	var matchArray = email.match(emailPat);

	if (matchArray==null) {

		return false;

	}

	return true;

}



function validateContact() {

	

	document.getElementById('contactName').className = '';

	document.getElementById('contactAddress').className = '';

	document.getElementById('contactEmail').className = '';

	document.getElementById('contactTelephone').className = '';

	document.getElementById('contactMessage').className = '';

	

	if (document.getElementById('contactName').value == '') {

		alert('Please enter your name');

		document.getElementById('contactName').className = 'error';

		document.getElementById('contactName').focus();

		return false;

	} else if (document.getElementById('contactAddress').value == '') {

		alert('Please enter your address');

		document.getElementById('contactAddress').className = 'error';

		document.getElementById('contactAddress').focus();

		return false;

	} else if (document.getElementById('contactEmail').value == '') {

		alert('Please enter your email address');

		document.getElementById('contactEmail').className = 'error';

		document.getElementById('contactEmail').focus();

		return false;

	} else if (emailCheck(document.getElementById('contactEmail').value) == false) {

		alert('Please enter a valid email address');

		document.getElementById('contactEmail').className = 'error';

		document.getElementById('contactEmail').focus();

		return false;

	} else if (document.getElementById('contactTelephone').value == '') {

		alert('Please enter your telephone number');

		document.getElementById('contactTelephone').className = 'error';

		document.getElementById('contactTelephone').focus();

		return false;

	} else if (document.getElementById('contactMessage').value == '') {

		alert('Please enter your message');

		document.getElementById('contactMessage').className = 'error';

		document.getElementById('contactMessage').focus();

		return false;

	}

	return true;

}