去往详情页之后定位到原来的位置

pushHistory();//监听页面回退
window.addEventListener("popstate", function(e) {
    $(location).attr('href', './index.html?index='+index+"&parm=true");
}, false);
function pushHistory() {//监听页面回退
    var state = {
        title: "title",
        url: "./index.html"
    };
    window.history.pushState(state, "title", "./index.html");
}

var index=0;
if(params.index){
    index = params.index;
}
var href="#index"+index;
$("#a").attr("href",href)
console.log(params)
if(params.parm){
    setTimeout(function() {//按钮自动点击事件实现
        if(document.all) {
            document.getElementById("a").click();
        }
        else {
            var e = document.createEvent("MouseEvents");
            e.initEvent("click", true, true);
            document.getElementById("a").dispatchEvent(e);
        }
    }, 200);

}