function reset_taxonomy () {
    document.search.taxonomy.value='';
    document.search.taxonomy.disabled=false;
    document.search.taxonomy_txt.value= '';
    document.search.taxonomy_txt.disabled=false;
    document.search.taxonomy_order.checked=false;
}

function reset_locality () {
    document.search.locality.value='';
    document.search.locality.disabled=false;
    document.search.locality_txt.value= '';
    document.search.locality_txt.disabled=false;
    document.search.locality_order.checked=false;
}

function reset_litho () {
    document.search.lithostratigraphy.value='';
    document.search.lithostratigraphy.disabled=false;
    document.search.lithostratigraphy_txt.value= '';
    document.search.lithostratigraphy_txt.disabled=false;
    document.search.litho_order.checked=false;
}

function reset_chrono () {
    document.search.chronostratigraphy1.value='';
    var lb='chronostratigraphy2'; clearlistbox2(lb);
}

function reset_year () {
    document.search.year1.value='';
    var lb='year2'; clearlistbox2(lb);
}