通用模式：
Javascript 正常取来源网页的URL只要用：
index.html：
<!DOCTYPE html> <html lang="zh-cn"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1,maximum-scale=1, user-scalable=no"> <title>新建H5模板</title> </head> <body> <a href="demo.html">链接</a> </body> </html>
demo.html：
<!DOCTYPE html> <html lang="zh-cn"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1,maximum-scale=1, user-scalable=no"> <title>新建H5模板</title> </head> <body> 当前URL：<input type="text" style=" 300px;" name="nowurl" id="nowurl"><br> 来源URL：<input type="text" style=" 300px;" name="fromurl" id="fromurl"> <script> var nowurl = document.URL; var fromurl = document.referrer; document.getElementById('nowurl').value = nowurl; document.getElementById('fromurl').value = fromurl; </script> </body> </html>
但，如果来源页是Javascript跳转过来的，上边的方法就拿不到了！所以用：
opener.location.href
var ref = '';
if (document.referrer.length > 0) {
ref = document.referrer;
}
try {
if (ref.length == 0 && opener.location.href.length > 0) {
ref = opener.location.href;
}
} catch (e) {}
其它相关的：
//获取页面完整地址
window.location.href
window.location.pathname
//获取域名
host = window.location.host;
host2=document.domain;
var num = Math.round(Math.random()*10000);
window.location.href = (window.location.pathname)+'?'+num+';
参考：http://www.jb51.net/article/91154.htm