function validEmailList(emailList)
{
	return validEmailListHandler(emailList, ',');
}

function validEmailListHandler(emailList, separator)
{
	// Expected format: email_1, email_2, ..., email_n

	var singleEmail = "";
	var singleChar;
	for(var i=0; i<emailList.length;i++)
	{
		singleChar = emailList.charAt(i); 
		if (singleChar == separator)
		{
			if (!validEmail(singleEmail))
			{
				alert(singleEmail + ' is not a valid email.');
				return false;
			}
			else
			{
				singleEmail = "";
			}
		}
		else
		{
			if ((singleChar != " ") && (singleChar != "\n"))
			{
				singleEmail = singleEmail + singleChar;
			}
		}
		//alert("singleEmail=" + singleEmail + "   singleChar=" + singleChar);
	}
	
	if (singleEmail == "") 
	{
		return true;
	}
	else
	{
		return validEmail(singleEmail);
	}
}