function setCookie( name, value, expires, path, domain, secure )
{
  // set time, it's in milliseconds
  var today = new Date();
  today.setTime( today.getTime() );

  if ( expires )
  {
	expires = expires * 1000 * 60 * 60 * 24;
  }
  var expires_date = new Date( today.getTime() + (expires) );

  document.cookie = name + "=" +escape( value ) +
	( ( expires ) ? ";expires=" + expires_date.toGMTString() : "" ) +
	( ( path ) ? ";path=" + path : "" ) +
	( ( domain ) ? ";domain=" + domain : "" ) +
	( ( secure ) ? ";secure" : "" );
}

function hideBar(donotshow) {
  document.getElementById('bar').style.display ='none'
  if (donotshow == true) {
	setCookie('bar','false','','/')
  }
}