// 在js代碼中第一行設置開關
var histNum = sessionStorage.getItem("xxx") ? sessionStorage.getItem("xxx") : 0
var histUrl = sessionStorage.getItem("hist") ? sessionStorage.getItem("hist") : window.location.href
if(histNum == 0) {
sessionStorage.setItem("xxx",1)
history.go(0)
}
var setInterOff = setInterval(()=>{
if(histUrl != window.location.href){
sessionStorage.removeItem("xxx")
sessionStorage.removeItem("hist")
clearInterval(setInterOff)
}
},1000)