function insert_fields(link, method, content) {
    var new_id = new Date().getTime();
    var regexp = new RegExp("new_" + method, "g")
    $(link).before(content.replace(regexp, new_id));
}

function remove_fields(link) {
    var hidden_field = $(link).prev("input[type=hidden]");
    if (hidden_field) {
        hidden_field.val('1');
    }
    $(link).closest(".fields").hide();
    }