百度主动推送代码 批量改进版

百度主动推送代码，批量推送页面所有URL。改进修复推送undefined错误问题。

<script type="text/javascript">
//by https://www./
var list = document.getElementsByTagName("a");
var n = "http//api.share.baidu.com/s.gif";
var ns = "https://sp0.baidu.com/9_Q4simg2RQJ8t7jm9iCKT-xh_/s.gif"; 
var r = window.location.href;
var url = [];
var curProtocol = window.location.protocol.split(':')[0];
if (curProtocol === 'https') {
for(var i=0;i<list.length;++i){
    if (typeof(list[i].href) != "undefined"){ 
    url.push(ns+'?l='+encodeURIComponent(list[i].href));
    }
}
} else {
for(var i=0;i<list.length;++i){
    if (typeof(list[i].href) != "undefined"){ 
    url.push(n+'?r='+r+'&l='+encodeURIComponent(list[i].href));
    }
}
}
for(var i=0;i<list.length;++i){
    var t = new Image;
    t.src = url[Math.round(Math.random() * list.length)];
}; 
</script>