function messageBox(messageString, messageType){
  var errorClass = '';

  messageType = messageType.toUpperCase();
  if(messageType == "ERROR"){
	errorClass = 'error';
  }else if(messageType == "SUCCESS"){
	errorClass = 'success';
  }else if(messageType == "WARNING"){
	errorClass = 'warning';
  }else if(messageType == "INFO"){
	errorClass = 'info';
  }
  
  var newMessage = '<div class="'+errorClass+'">'+messageString+'</div>';
  
  $('#masterMessageBox').html($('#masterMessageBox').html()+newMessage);
  $('#masterMessageBox').fadeIn('slow');
  window.setTimeout("$('#masterMessageBox').fadeOut('slow');", 10000);
}