【Wordpress】翻译按钮 切换翻译模式

var count = 0;
var change_mode_btn = document.getElementsByClassName(change_translate);
var trs_source = document.getElementsByClassName(yll-trs-source);
var trs_target = document.getElementsByClassName(yll-trs-target);

change_mode_btn[0].addEventListener(click, myFunction);

function myFunction() {
    count = (count + 1)%3
  console.log(count)
  if (count == 0){
    for (var i = 0, len = trs_source.length; i < len; i++){
    trs_source[i].setAttribute(style,display:none;) ;} 
    for (var i = 0, len = trs_target.length; i < len; i++){
    trs_target[i].setAttribute(style,display:block;) ;} 
  }else if (count == 1){
    for (var i = 0, len = trs_source.length; i < len; i++){
    trs_source[i].setAttribute(style,display:block;) ;} 
    for (var i = 0, len = trs_target.length; i < len; i++){
    trs_target[i].setAttribute(style,display:none;) ;} 
  }else{
    for (var i = 0, len = trs_source.length; i < len; i++){
    trs_source[i].setAttribute(style,display:block;) ;} 
    for (var i = 0, len = trs_target.length; i < len; i++){
    trs_target[i].setAttribute(style,display:block;) ;} 
  }
}