function sf() {
  var e = 0;
  if (!document.forms.length) return;
  var myform = document.forms[0];
  while (e < myform.elements.length) {
    if (myform.elements[e].type == "text" || myform.elements[e].type == "textarea") {
      myform.elements[e].focus();
      break;
    }
    e++;
  }
}