function hideError(form,field_name) {
    var form_element;
    
    if ( form ) form_element = form.elements[field_name];
    else form_element = dhtml.getElem( field_name );
    
    if ( form_element ) {
        switch( form_element.type ) {

            case 'text':
            case 'password':
            case 'textarea':
            case 'checkbox':
            case 'file':
                if ( form_element.className.indexOf( 'req' ) != -1 )
                    form_element.className = 'req inputbox';
                else
                    form_element.className = 'inputbox';
                break;

            case 'selectbox':
            case 'select-one':
            case 'select-multiple':
                if ( form_element.className.indexOf( 'req' ) != -1 )
                    form_element.className = 'req selectbox';
                else
                    form_element.className = 'selectbox';
                break;

            case 'button':
            case 'hidden':
            case 'image':
            case 'radio':
            case 'reset':
            case 'submit':
                break;

        }

        dhtml.hideElem( 'err_' + form_element.name );
        if ( dhtml.getElem( 'inf_' + form_element.name ) )
            dhtml.hideElem( 'inf_' + form_element.name );

    }
};

function resetForm(form) {
    for( i=0; i<=form.elements.length; ++i ) {
        if ( form.elements[i] )
            if ( form.elements[i].name )
                hideError( form, form.elements[i].name);
    };
}

function showSomethingBase(form, field_name, error_text, with_alert, cls1, cls2 ) {
    if ( cls1 == '' ) cls1 = 'err';
    if ( cls2 == '' ) cls2 = 'er';
    var box_field_name = field_name;
    var pq = box_field_name.indexOf( '[');
    if ( pq > 0 ) {
        box_field_name = box_field_name.substring( 0, pq );
    }
    var box = dhtml.getElem( cls1 + '_' + box_field_name );
    var form_element;
    if ( form )
        form_element = form.elements[field_name];
    else
        form_element = dhtml.getElem( field_name );
    if ( with_alert ) {
        if ( cls1 == 'err' )
            myAlert( error_text.replace( /<V?[^>]+(>|$)/g, '' ) );
        else
            myInfo( error_text.replace( /<V?[^>]+(>|$)/g, '' ) );
    }
    if ( form_element && form_element.className ) {
        if ( form_element.className.indexOf( 'req' ) == - 1 )
            form_element.className = cls2+' inputbox';
        else
            form_element.className = 'req'+cls2+' inputbox';
    }
    if ( box ) {
        box.innerHTML = error_text;
        dhtml.showElem( cls1 + '_' + box_field_name );
    }
    if ( form_element ) {
        if ( form_element.focus ) {
            try { form_element.focus(); } catch(error) { } finally { };
        }
    }
}

function showError(form, field_name, error_text, with_alert) {
    showSomethingBase(form, field_name, error_text, with_alert, 'err', 'er' );
}

function showInfo(form, field_name, error_text, with_alert) {
    showSomethingBase(form, field_name, error_text, with_alert, 'inf', 'in' );
}