I need the javascript code for social media share popup windows

I need to create social icon popup windows for Facebook, Twitter and
Linkedin where I can explicity alter as much text and image content for
each as possible

Specifically, I need the ability to find where to edit each of these for all 3 links:

popup window - in the widow:Title Text : Image:Copy Text with an embeded link back to my site

Thanks
Charles

In general, I suggest you try addthis.com that takes care of a lot of this for you. Are you looking for something different?

Thanks. The problem was that my company was working with a client who didn’t want any third party solutions like addthis or sharethis - so I needed the custom code to add each share button. It was not too hard to find posted code for twitter and linkedin but facebook was a nightmare. I was saved by this page https://developers.facebook.com/docs/plugins/share-button and especially the code debugger that will show errors in your setup https://developers.facebook.com/tools/debug/og/object/ - a key thing is that you have to create a separate installation for every page since fb assumes you are sharing ‘this’ page and gives you the code only for the page you are on.