vesta/web/js/pages/edit_server_nginx.js

function toggleOptions(){
    if($('#advanced-options').is(':visible')){
        $.removeCookie('advanced');
        $('#advanced-options').hide();
        $('#basic-options').show();
    } else {
        $.cookie('advanced', 1);
        $('#advanced-options').show();
        $('#basic-options').hide();

        var advance_options = $('#advanced-options textarea');

        $('#vstobjects input[type=text]').each(function(i, elm){
            var search = $(elm).attr('regexp');
            var prev_value = $(elm).attr('prev_value');
            $(elm).attr('prev_value', $(elm).val());
            var regexp = new RegExp('('+search+')(.+)('+prev_value+')');
            advance_options.val(advance_options.val().replace(regexp, '$1$2' + $(elm).val()));
        })
    }
}

$('#vstobjects').submit(function(){
    if($('#basic-options').is(':visible')){
        var advance_options = $('#advanced-options textarea');

        $('#vstobjects input[type=text]').each(function(i, elm){
            var search = $(elm).attr('regexp');
            var prev_value = $(elm).attr('prev_value');
            $(elm).attr('prev_value', $(elm).val());
            var regexp = new RegExp('('+search+')(.+)('+prev_value+')');
            advance_options.val(advance_options.val().replace(regexp, '$1$2' + $(elm).val()));
        })
    }
});

$(document).ready(function() {
    if($.cookie('advanced')){
        toggleOptions();
    }
});