function checkEmail (email) {
	if (email.length == 0) {
		window.alert("You must provide an email address.");
		return false;
	}
	if (email.indexOf("/") > -1) {
		window.alert("Email address has invalid character: /");
		return false;
	}
	if (email.indexOf(":") > -1) {
		window.alert("Email address has invalid character: :");
		return false;
	}
	if (email.indexOf(",") > -1) {
		window.alert("Email address has invalid character: ,");
		return false;
	}
	if (email.indexOf(";") > -1) {
		window.alert("Email address has invalid character: ;");
		return false;
	}
	if (email.indexOf("@") < 0) {
		window.alert("Email address is missing @");
		return false;
	}
	if (email.indexOf("\.") < 0) {
		window.alert("Email address is missing .");
		return false;
	}
		return true;
	}
	
	function checkForm(formObj) {
	return checkEmail (formObj.email.value); }