function decide() {

 if (document.control.search.value.length < 1) {
     window.alert ("Please enter a search keyword.");
     return false;
    }

 if (document.control.whosearch[0].checked) {
  document.myca.sSearchString.value = document.control.search.value;
  document.myca.submit();
 } else {
  if (document.control.whosearch[1].checked) {
   document.thissite.q.value = document.control.search.value;
   document.thissite.submit();
  } else {
   alert("You must select whether you want to search My CA or This Site.");
  }
 }
 return false;
}