var ras_download = {
  download : function(url, msg) {
    $('body').append('<iframe id="file_download_iframe" width="0" height="0" src="' + url + '" style="display: none;" title="다운로드"></iframe>');
    document.getElementById('file_download_iframe').onreadystatechange = ras_download.uniframe;
  },
  uniframe : function() {
  
  	var status = (document.getElementById('file_download_iframe')).readyState;
  
    if (status == 'complete' || status == 'interactive') {
      $('#file_download_iframe').remove();
    }
  }
}