function selall(beg,end) {
  for (i=beg;i<=end;i++) {
   care='document.exp.o'+i+'.checked='+document.exp.ix.checked;
   eval(care);
  }
 }

 function setselect(form, sel, what) {
  obj = form.elements[sel];
  items=obj.length;
  for (i=0; i<items; i++) {
   obj.options[i].selected=what;
  }
 }