// Check for email address: look for [@] and [.] 

function isEmail(elm) {
	if (elm.value.indexOf("@") + "" != "-1" &&
		elm.value.indexOf(".") + "" != "-1" &&
		elm.value != "") 
	return true;
	else return false;
}

// Check for null and for empty

function isFilled(elm) {
	if (elm.value == "" ||
		elm.value == null) 
	return false;
	else return true;
}

function isReady(form) {

	// is address element a real email address?
	if (isEmail(document.getElementById('data[email]')) == false) { 
	alert("Please enter a valid email address.");
	document.getElementById('data[email]').focus();
	return false;
	}

  
return true;
}