function popem(elN, c) {
      document.getElementById(elN).className=c;
}

function sf(){document.f.q.focus();}

function poptab(ahref) {
   newtab = ahref.getAttribute("id");
   popem(lasttab, "");
   popem(newtab, "seltab");
   lasttab = newtab;
   document.getElementById("tabname").value=newtab.substring(1);
   sf();
   return false;
}

lasttab="t<?=$tab?>";