<!-- 把下列代码加到BODY中 -->

<script>
  var cookieString = new String(documents.cookie)
  var cookieHeader = 'happy_pop' //更换happy_pop为任意名称
  var beginPosition = cookieString.indexOf(cookieHeader)
  if (beginPosition <0){
window.open('http://www.artcn.cn/','','top=0,left=0,width=787,height=480,toolbar=yes,menubar=yes,scrollbars=yes,resizable=yes,location=yes,status=yes');
var Then = new Date()    
   Then .setTime(Then.getTime() + 12*60*60*1000 ) //同一ip设置过期时间,即多长间隔跳出一次
   documents.cookie = 'happy_pop=yes;expires='+ Then.toGMTString()  //更换happy_pop和第4行一样的名称
    }//more javascript from http://www.sj33.cn/
</script>

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