Get relative URL from absolute URL

Question

I want to get the relative URL from an absolute URL in JavaScript using regex and the replace method.

I tried the following but it is not working:

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Answer 1

If by "relative URL" you mean the part of the string after the first single /, then it's simple:

document.write(str.replace(/^(?:\/\/|[^/]+)*\//, ''));

This matches all the characters up to the first single / in the string and replaces them with the empty string.

In: http://localhost/my/page.jsp --> Out: /my/page.jsp