js判断AdBlock广告是否开启拦截

js判断当前网站是否开启了AdBlock广告拦截功能，如果开启AdBlock插件显示提示“为了支持本项目的长期发展，请将本网站加入广告拦截器的白名单。”，否则不显示！

function ABDetected(){
  var adBlockDetected_div=document.createElement("div");
  adBlockDetected_div.style.cssText="position: absolute; top: 0; left: 0; width: 100%; background: #fc6600; color: #fff; z-index: 9999999999; font-size: 14px; text-align: center; line-height: 1.5; font-weight: bold; padding-top: 6px; padding-bottom: 6px;";adBlockDetected_div.innerHTML="为了支持本项目的长期发展，请将本网站加入广告拦截器的白名单。";
  document.getElementsByTagName("body")[0].appendChild(adBlockDetected_div);
  var adBlockDetected_close=document.createElement("div");
  adBlockDetected_close.style.cssText="position: absolute; top: 0; right: 10px; width: 30px; height: 30px; background: #fc6600; color: #fff; z-index: 9999999999; line-height: 30px; cursor: pointer;";
  adBlockDetected_close.innerHTML="×";
  adBlockDetected_div.appendChild(adBlockDetected_close);
  adBlockDetected_close.onclick=function(){
    this.parentNode.parentNode.removeChild(this.parentNode)
  }
}
function docReady(t){
  "complete"===document.readyState||"interactive"===document.readyState?setTimeout(t,1):document.addEventListener("DOMContentLoaded",t)
}
docReady(function(){
  setTimeout(function(){
    if(window._AdBlockInit===undefined){
	  ABDetected()
	}
  },3e3)
});