function flashMessage(message, level, header){
  if(message === undefined) return;

  if(jQuery.jGrowl !== undefined && typeof jQuery.jGrowl === 'function'){
    var params = {};

    if(top.document.jgrowl_params !== undefined){
      params = top.document.jgrowl_params;
    }
    if(level !== undefined && level !== ''){
      params.theme = level;
    }
    if(header !== undefined && header !== ''){
      params.header = header;
    }

    jQuery.jGrowl(message, params);
  }
  else{
    alert(message);
  }
}