function getUrlParams() {
    var args = new Object();
    var query = location.search.substring(1); //获取查询串
    var pairs = query.split("&"); //在逗号处断开
    for (var i = 0; i < pairs.length; i++) {
        var pos = pairs[i].indexOf('='); //查找name=value
        if (pos == -1) continue; //如果没有找到就跳过
        var argname = pairs[i].substring(0, pos); //提取name
        var value = pairs[i].substring(pos + 1); //提取value
        args[argname] = unescape(value); //存为属性
    }
    return args;
}

function jump(){
    var args = getUrlParams()['origin'];
    var path = atob(args);
    self.location=path;
}
jump();