function yosthumb0() {
if (yos_ts_ifvisible >= 1) {
document.getElementById("yos_button_item1").style.display = 'block';}
if (yos_ts_ifvisible >= 2) {
document.getElementById("yos_button_item2").style.display = 'none';}
if (yos_ts_ifvisible >= 3) {
document.getElementById("yos_button_item3").style.display = 'none';}
if (yos_ts_ifvisible >= 4) {
document.getElementById("yos_button_item4").style.display = 'none';}
}

function yosthumb1() {
if (yos_ts_ifvisible >= 1) {
document.getElementById("yos_button_item1").style.display = 'none';}
if (yos_ts_ifvisible >= 2) {
document.getElementById("yos_button_item2").style.display = 'block';}
if (yos_ts_ifvisible >= 3) {
document.getElementById("yos_button_item3").style.display = 'none';}
if (yos_ts_ifvisible >= 4) {
document.getElementById("yos_button_item4").style.display = 'none';}
}

function yosthumb2() {
if (yos_ts_ifvisible >= 1) {
document.getElementById("yos_button_item1").style.display = 'none';}
if (yos_ts_ifvisible >= 2) {
document.getElementById("yos_button_item2").style.display = 'none';}
if (yos_ts_ifvisible >= 3) {
document.getElementById("yos_button_item3").style.display = 'block';}
if (yos_ts_ifvisible >= 4) {
document.getElementById("yos_button_item4").style.display = 'none';}
}


function yosthumb3() {
if (yos_ts_ifvisible >= 1) {
document.getElementById("yos_button_item1").style.display = 'none';}
if (yos_ts_ifvisible >= 2) {
document.getElementById("yos_button_item2").style.display = 'none';}
if (yos_ts_ifvisible >= 3) {
document.getElementById("yos_button_item3").style.display = 'none';}
if (yos_ts_ifvisible >= 4) {
document.getElementById("yos_button_item4").style.display = 'block';}
}