function verifyForm(src){
    var frm = document.forms["myform"]
    var s = i18n_Form_Missing_Data + "\n\n"
    var formOK = true;
    switch (src.name.toUpperCase()){
        case "BTN_QUERY_MODEL_SERIAL":
            if (frm.TAB.value=='') frm.TAB.value='COVERAGE'
            if (frm.SERIALNO.value==""){
                s += i18n_SerialNo + "\n";
                formOK = false;
                frm.SERIALNO.focus();
            }
            if (frm.PRODUCTNO.value==""){
                s += i18n_ModelNo + "\n";
                formOK = false;
                frm.PRODUCTNO.focus();
            }
            break;
        case "BTN_QUERY_SONO":
            if (frm.TAB.value=='') frm.TAB.value='CURRENTSERVICE'
            if (frm.SONO.value==""){
                s += i18n_SONo + "\n";
                formOK = false;
                frm.SONO.focus();
            }
            break;
        case "BTN_QUERY_MODEL":
            if (frm.TAB.value=='') frm.TAB.value='PRODUCTSERVICE'
            if (frm.PRODUCTNO_ONLY.value==""){
                s += i18n_ModelNo + "\n";
                formOK = false;
                frm.PRODUCTNO_ONLY.focus();
            }
            break;
    }
    if (!formOK){
        alert(s);
        return false;
    } else {return true}
}