function reload(form)
{
  var val=form.cat.options[form.cat.options.selectedIndex].value; 
  self.location='index.php?cat=' + val ;
}

function reload3(form)
{
  var val=form.cat.options[form.cat.options.selectedIndex].value; 
  var val2=form.subcat.options[form.subcat.options.selectedIndex].value; 
  self.location='index.php?cat=' + val + '&cat3=' + val2 ;
}