function newsletterValidate(){
	var errorStr = "";
	var returnVar = true;
	
	var emailObj = document.getElementById('emailaddress');
	
	if (emailObj) {
		if (emailObj.value == "") {
			errorStr += "• Λάθος email διεύθυνση.";
			returnVar = false;
		}
		else
		{
			valid = Validate_Email_Address(document.getElementById('emailaddress').value);	
			if(valid == false){
				errorStr += "• Λάθος email διεύθυνση.";
				returnVar = false;
			}
		}
	}
	
	var errorMessageSummary = document.getElementById('newsletterAlert');
	errorMessageSummary.style.display = 'block';
	if (errorMessageSummary)
	{
		if (errorStr!="") {
			errorMessageSummary.style.display = "block";
			errorMessageSummary.innerHTML = errorStr + "<br>";
		}
		else {
			errorMessageSummary.style.display = "none"; }
	}
	else
	{
		if (errorStr!="") {
			alert(errorStr);
		}
	}
	
	return returnVar;
}