function externalLinks() {
  if (!document.getElementsByTagName) return;
  var anchors = document.getElementsByTagName("a");
  for (var i=0; i<anchors.length; i++) {
    var anchor = anchors[i];
    if (anchor.getAttribute("href") &&
        anchor.getAttribute("rel") == "external")
      anchor.target = "_blank";
    }
}

window.onload = externalLinks;

var _e_r = new RegExp("^([\\#\\$\\&'\\*\\+\\-\\/\\=\\?\\^\\_\\`\\{\\}\\|\\~a-zA-Z0-9-]+(\\.[\\#\\$\\&'\\*\\+\\-\\/\\=\\?\\^\\_\\`\\{\\}\\|\\~a-zA-Z0-9-]+)*@[a-zA-Z0-9-]+(\\.[a-zA-Z0-9-]+)+)?$");

function validateEmail(addr) {
    return _e_r.test(addr);
}