完美解决ie浏览器location.href不刷新页面的问题，进入页面只刷新一次

/* ie不刷新列表bug */
try{
    var agent = navigator.userAgent.toLowerCase();
    var ieflag = /(msie\s|trident.*rv:)([\w.]+)/.test(agent);
    if(ieflag){
        window.num = Number(window.localStorage.getItem("num"));
        var num = window.num++;
        if(window.num == 2){
            window.localStorage.removeItem("num");
            window.location.reload();
        }
    }
}catch(e){
}