addLoadListener(init);

function init()
{

  
  document.getElementById('big_picture').onclick  = function()
  {var survey = makePopup(this.href, 500,215, 'scroll'); return survey.closed;};
  

  return true;
}

function makePopup(url, width, height, overflow)
{
//  if (width > 640) { width = 640; }
//  if (height > 640) { height = 640; }

  if (overflow == '' || !/^(scroll|resize|both)$/.test(overflow))
  {
    overflow = 'both';
  }

  var win = window.open(url, '',
      'width=' + width + ',height=' + height
      + ',scrollbars=' + (/^(scroll|both)$/.test(overflow) ? 'yes' : 'no')
      + ',resizable=' + (/^(resize|both)$/.test(overflow) ? 'yes' : 'no')
      + ',status=yes,toolbar=no,menubar=no,location=no'
  );

  return win;
}