Ajax Http-Get,Post to an Https Url

Hello Everyone,
My query is as under:-

I have a url which is hoisted on https.I don’t have any access to the server of this url.

I have to send an AJAX HTTP Post Request to this Url.
Upon initiating an HTTP Post request,I am getting an error saying that this url or server requires SSL certificate.
How can I obtain these certificates?
My question in simple words is
How to send an HTTP request(whether Get or Post) using client side scripting, to a Url which is on secured site ie “Https”?
tx in advance
Jatinder Walia

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