function setCheckboxes(the_form, do_check)
{
    var elts      = (typeof(document.forms[the_form].elements['selected_db[]']) != 'undefined')
                  ? document.forms[the_form].elements['selected_db[]']
                  : (typeof(document.forms[the_form].elements['selected_item[]']) != 'undefined')
          ? document.forms[the_form].elements['selected_item[]']
          : document.forms[the_form].elements['selected_fld[]'];
    var elts_cnt  = (typeof(elts.length) != 'undefined')
                  ? elts.length
                  : 0;

    if (elts_cnt) {
        for (var i = 0; i < elts_cnt; i++) {
            elts[i].checked = do_check;
        } // end for
    } else {
        elts.checked        = do_check;
    } // end if... else

    return true;
} // end of the 'setCheckboxes()' function

var newwindow;
function helpwindow(id)
{
  newwindow=window.open('http://js-eddica.cz/admin/help/show_item.php?hei_id='+id,'name','height=400,width=600,resizable=1,scrollbars=1');
  if (window.focus) {newwindow.focus()}
}

var newlogwindow;
function audiologwindow(id)
{
  newlogwindow=window.open('http://js-eddica.cz/admin/kurz/audio_log.php?kho_id='+id,'name','height=500,width=600,resizable=1,scrollbars=1');
  if (window.focus) {newlogwindow.focus()}
}