/* added 2004-06-10 by Michael Keck
     *       we need this for Backwards-Compatibility and resolving problems
     *       with non DOM browsers, which may have problems with css 2 (like NC 4)
    */
    var isDOM      = (typeof(document.getElementsByTagName) != 'undefined'
                      && typeof(document.createElement) != 'undefined')
                   ? 1 : 0;
    var isIE4      = (typeof(document.all) != 'undefined'
                      && parseInt(navigator.appVersion) >= 4)
                   ? 1 : 0;
    var isNS4      = (typeof(document.layers) != 'undefined')
                   ? 1 : 0;
    var capable    = (isDOM || isIE4 || isNS4)
                   ? 1 : 0;
    // Uggly fix for Opera and Konqueror 2.2 that are half DOM compliant
    if (capable) {
        if (typeof(window.opera) != 'undefined') {
            var browserName = ' ' + navigator.userAgent.toLowerCase();
            if ((browserName.indexOf('konqueror 7') == 0)) {
                capable = 0;
            }
        } else if (typeof(navigator.userAgent) != 'undefined') {
            var browserName = ' ' + navigator.userAgent.toLowerCase();
            if ((browserName.indexOf('konqueror') > 0) && (browserName.indexOf('konqueror/3') == 0)) {
                capable = 0;
            }
        } // end if... else if...
    } // end if


/**
 * Checks/unchecks all tables
 *
 * @param   string   the form name
 * @param   boolean  whether to check or to uncheck the element
 *
 * @return  boolean  always true
 */
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_tbl[]']) != 'undefined')
          ? document.forms[the_form].elements['selected_tbl[]']
          : 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

/**
 * Checks/unchecks all rows
 *
 * @param   string   the form name
 * @param   boolean  whether to check or to uncheck the element
 * @param   string   basename of the element
 * @param   integer  min element count
 * @param   integer  max element count
 *
 * @return  boolean  always true
 */
// modified 2004-05-08 by Michael Keck <mail_at_michaelkeck_dot_de>
// - set the other checkboxes (if available) too
function setCheckboxesRange(the_form, do_check, basename, min, max)
{
    for (var i = min; i < max; i++) {
        if (typeof(document.forms[the_form].elements[basename + i]) != 'undefined') {
            document.forms[the_form].elements[basename + i].checked = do_check;
        }
        if (typeof(document.forms[the_form].elements[basename + i + 'r']) != 'undefined') {
            document.forms[the_form].elements[basename + i + 'r'].checked = do_check;
        }
    }

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

// added 2004-05-08 by Michael Keck <mail_at_michaelkeck_dot_de>
//   copy the checked from left to right or from right to left
//   so it's easier for users to see, if $cfg['ModifyAtRight']=true, what they've checked ;)
function copyCheckboxesRange(the_form, the_name, the_clicked)
{
    if (typeof(document.forms[the_form].elements[the_name]) != 'undefined' && typeof(document.forms[the_form].elements[the_name + 'r']) != 'undefined') {
        if (the_clicked !== 'r') {
            if (document.forms[the_form].elements[the_name].checked == true) {
                document.forms[the_form].elements[the_name + 'r'].checked = true;
            }else {
                document.forms[the_form].elements[the_name + 'r'].checked = false;
            }
        } else if (the_clicked == 'r') {
            if (document.forms[the_form].elements[the_name + 'r'].checked == true) {
                document.forms[the_form].elements[the_name].checked = true;
            }else {
                document.forms[the_form].elements[the_name].checked = false;
            }
       }
    }
}


// added 2004-05-08 by Michael Keck <mail_at_michaelkeck_dot_de>
//  - this was directly written to each td, so why not a function ;)
//  setCheckboxColumn(\'id_rows_to_delete' . $row_no . ''\');
function setCheckboxColumn(theCheckbox){
    if (document.getElementById(theCheckbox)) {
        document.getElementById(theCheckbox).checked = (document.getElementById(theCheckbox).checked ? false : true);
        if (document.getElementById(theCheckbox + 'r')) {
            document.getElementById(theCheckbox + 'r').checked = document.getElementById(theCheckbox).checked;
        }
    } else {
        if (document.getElementById(theCheckbox + 'r')) {
            document.getElementById(theCheckbox + 'r').checked = (document.getElementById(theCheckbox +'r').checked ? false : true);
            if (document.getElementById(theCheckbox)) {
                document.getElementById(theCheckbox).checked = document.getElementById(theCheckbox + 'r').checked;
            }
        }
    }
}


/**
  * Checks/unchecks all options of a <select> element
  *
  * @param   string   the form name
  * @param   string   the element name
  * @param   boolean  whether to check or to uncheck the element
  *
  * @return  boolean  always true
  */
function setSelectOptions(the_form, the_select, do_check)
{
    var selectObject = document.forms[the_form].elements[the_select];
    var selectCount  = selectObject.length;

    for (var i = 0; i < selectCount; i++) {
        selectObject.options[i].selected = do_check;
    } // end for

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