Redirect to another URL based on the URL you entered

Question

My problem is this,

I want to add /email the url that was typed in the browser and redirect to that new url. I am using windows server 2012 IIS. The site accepts more than one Host.

For example on the same site I accept the host Webmail.joao.com.br, Webmail.kaina.com.br, Webmail.vicor.com.br.

I wanted this redirection to be done by adding "/emailx" to the host that was typed and the address does not show the path, only what was originally typed.

Now I use the following code, but I can only redirect to a single URL:

<frame src="http://webmail.velmo.com.br/MEWebmail" frameborder="0" scrolling="no">

Answer 1

One way to show another page within the same domain in a frame is to dynamically change the address via Javascript:

First, set a blank address and a id in the frame:

<frame id="webmail" src="#" frameborder="0" scrolling="no">

Then you can use a function more or less like the following to modify the URL and change the src of frame:

function defineFrameUrl(originalUrl) {
  var frame = document.getElementById('webmail');
  if (frame) frame.src = originalUrl + "/emailx";
}

And finally, you call the function by passing the current address:

defineFrameUrl(window.location.href);