如何测试员工是否通过VPN与客户端JavaScript连接
有员工会访问外部网站，以查看内部托管网站的链接。我们只希望链接显示如果他们有VPN入网络。
There are employees that will visit the external site to see a link to an internally hosted site. We only want the link to show if they have VPN'd into the network.
如何使用JavaScript，我可以测试不在线外部。
How, with JavaScript, can I test the availability of something that isn't online externally.
我试图使用.JS文件，但它可以获得缓存，似乎可用，当它真的不是。
I have attempted to use a .JS file but it can get cached and seem available when it really isn't. Same with an image.
也许JSONP与MockJax避免跨站点脚本错误？
Maybe JSONP with MockJax to avoid cross-site scripting errors?
在内部网站上创建一个JS文件，嵌入链接或将它们从 display：none 更改为块（或任何显示）。在页面本身只是创建一个对脚本的引用，并附加当前日期时间到结束，以避免从服务器缓存。
On the intranet site make a JS file that will either embed the links or change them from display: none to display: block (or whatever display). On the page itself simply create a reference to that script and append the current date time to the end to avoid caching from the server.
测试用例（这假设你有localhost设置，但您可以将其更改为任何Intranet位置）：
前往此处和将不显示文本。
在 localhost 下设置内容为
Test case (this assumes you have localhost set up, but you can change it to be whatever intranet location):
Go here and the text won't be displayed.
Set up a file called test.js under localhost with the contents
$(function(){
$('#test').show();
});
刷新页面，它将显示DIV的内容。
refresh the page and it will display the DIV's contents.