// JavaScript Document

function validateSubscription() {
	var error = false;
	var email = document.getElementById("txtEmail");
	
	var emailLabel = document.getElementById("label4email");
	var emailFlag;
	
	if(email.value.length == 0) { // if email is not typed
		error = true;
		email.style.background = 'Yellow';	
		emailLabel.innerHTML = "<br/>Email address is required!";
		email.focus();
	} else {
		emailFlag = isEmail(email.value);
		if(emailFlag == true) {
			email.style.background = 'White';
			emailLabel.innerHTML = "";
		} else {
			error = true;
			emailLabel.innerHTML = "<br/>Email address is not valid!";
			email.style.background = 'Yellow';	
		}
	} // if(email.value.length == 0)

	if(error == true) {
		return false;
	} // if(error == true)
} // validate(...)