if (navigator.userAgent.toLowerCase().indexOf('msie') != -1) {
  onload = function setExternal() {
    domain = 'sgdhs';
    re = new RegExp('^http://(www.)?'+domain);
    for (i=0; i<document.getElementById('center').
    getElementsByTagName('a').length; i++) {
      if (!document.getElementById('center').getElementsByTagName('a')[i].href.match(re)) {
        document.getElementById('center').getElementsByTagName('a')[i].className = 'offsite';
      }
    }
  }
}