function checkForm() {
	var sFirstname = trim(getValue("txtFirstname"), " ");
	var sLastname = trim(getValue("txtLastname"), " ");
	var sEmail = trim(getValue("txtEmail"), " ");
	var sEmailConfirm = trim(getValue("txtEmailConfirm"), " ");
	var sMessage = trim(getValue("txtMessage"), " ");

	if (sFirstname.length == 0) {
		alert("Please enter your first name");
		setFocus("txtFirstname");
		return false;
	}

	if (sLastname.length == 0) {
		alert("Please your last name");
		setFocus("txtLastname");
		return false;
	}

	if (isEMail(sEmail) == false) {
		alert("Please type in your email address");
		setFocus("txtEmail");
		return false;
	}

	if (isEMail(sEmailConfirm) == false) {
		alert("Please confirm your email address");
		setFocus("txtEmailConfirm");
		return false;
	}

	if (sEmail != sEmailConfirm) {
		alert("Email addresses do not match");
		setFocus("txtEmail");
		return false;
	}

	if (sMessage.length == 0) {
		alert("Please enter a your message");
		setFocus("txtMessage");
		return false;
	}

	disableElement("Submit", true);

	return true;
}

window.onload = function() {
	setFocus("txtFirstname");
}