获取表单的提交URL作为相对URL？

Question

Let's say I have a form located at:

http://www.mysite.com/some/place/some/where/index.php

And I have this form:

<form action="submit.php"> ... </form>

If I do this:

$("form").attr("action");

I will get:

submit.php

What is a foolproof way to get the action from the form, so that it includes the entire URL:

http://www.mysite.com/some/place/some/where/submit.php

?

Answer 1

Try

$("form").prop("action");

or (assuming your form is in the same folder as the page and the page URL ends with /something)

var loc = location.href;
var page = loc.substring(0,loc.lastIndexOf("/")+1)+
  $("form").attr("action");

Handle query strings and hashes especially for Quentin:

Live Demo

var loc = location.origin + location.pathname;
var action = $("form").attr("action").split("/").pop();
var page = loc.substring(0,loc.lastIndexOf("/"))+"/"+action;

Answer 2

var el = document.createElement('a');
el.href = $("form").prop("action");

alert(el.href);

Chrome adjusts the href to give the absolute url, not sure with other browsers