function sayit() {
   if (document.getSelection) // older Mozilla versions
   {
      var selectedString = document.getSelection();
   }
   else if (document.all) // MSIE 4+
   {
                      var selectedString =
                      document.selection.createRange().text;
   }
 
   else if (window.getSelection) // recent Mozilla versions
   {
      var selectedString = window.getSelection();
   }
   document.rs_form.rstext.value = selectedString;
   if (!document.rs_form.url.value) {
      if (window.location.href)
      {
         document.rs_form.url.value = window.location.href;
      }
      else if (document.location.href)
      {
         document.rs_form.url.value = document.location.href;
      }
   }
}
 
function copyselected()
{
   setTimeout("sayit()",50);
   return true;
}
 
document.onmouseup = copyselected;
document.onkeyup = copyselected;