remove duplicate forward slashes from the URL

How can I remove duplicate forward slashes from the a url, but keep the // which comes after http: so that the URL does not break.

http://localhost//example/author/admin///

should be

http://localhost/example/author/admin/

I'm trying this, but it will remove only the last slash. I want to remove all double

abc = 'http://localhost//example/author/admin///';
clean_url = abc.replace(/\/$/,'');
alert(clean_url);

The following checks only three slashes.

clean_url = abc.replace("///", "");
alert(clean_url);

I want to remove all the duplicate slashes.

You can use:

abc.replace(/([^:]\/)\/+/g, "$1");

Working Demo

Update: Already answered by Halcyon

This question has been answered before...

var str = 'http://localhost//example/author/admin///';    
var clean_url = str.replace(/([^:])(\/\/+)/g, '$1/');

alert(clean_url);

DEMO

I know there're different answers solving the same problem, just another approach :)

var s = "http://www.some-url.com//path//to";
var res = s.replace(/(https?:\/\/)|(\/)+/g, "$1$2");