function slider(sliderid, arrow){
var parent_slider = findParentNode("slider", sliderid, "class");
var slider = parent_slider.getElementsByTagName('*');

for (var i = 0; i < slider.length; i++) {
if (slider[i].getAttribute("name") == "select_page") {
var select_page = slider[i];
}
if (slider[i].getAttribute("name") == "arrows") {
var arrows = slider[i];
}
if (slider[i].getAttribute("name") == "page") {
var page_block = slider[i];
}
if (slider[i].getAttribute("name") == "points") {
var points = slider[i];
}
if (slider[i].getAttribute("name") == "pages") {
var pages = slider[i];
}
}

var pages_count = pages.children.length;

var points_count = "";
var select_page_number = select_page.innerHTML;
if (select_page_number != "") {
page = Number(select_page_number);
}else{
page = 0;
}

if (points.children.length != pages_count) {
for (var i = 0; i < pages_count; i++) {
points_count = points_count + points.innerHTML;
}
points.innerHTML = points_count;
}

if (page != pages_count-1 && arrow == "right") {
page += 1;
}

if (page != 0 && arrow == "left") {
page -= 1;
}


var point_find = points.children;
for (var i = 0; i < point_find.length; i++) {
point_find[i].removeAttribute("status");
}

if (arrow == "point") {
var point_count = sliderid.parentElement.children;
for (var i = 0; i < point_count.length; i++) {
point_count[i].removeAttribute("status");
if (point_count[i] == sliderid) {
page = i;
}
}
}

var find_arrows = arrows.getElementsByTagName('s');
if (page > 0) {
find_arrows[0].removeAttribute("status");
}else{
find_arrows[0].setAttribute("status", "hidden");
}

if (page != pages_count-1) {
find_arrows[1].removeAttribute("status");
}else{
find_arrows[1].setAttribute("status", "hidden");
}

points.children[page].setAttribute("status", "select");
select_page.innerHTML = page;
page_block.children[0].innerHTML = pages.children[page].innerHTML;

page_block.children[0].removeAttribute("status");

function anim() {
page_block.children[0].setAttribute("status", "anim");
}
setTimeout(anim, 10);
}