494527 Lightbox - Custom

I need a script that will allow me to host a lightbox script from my website, but with the ability to use the link on 3rd party websites. For example, my lightbox script is on my server (like any lightbox), but if you click the same link posted on a 3rd party website or forum, it just shows the full size html or php page. I want the opposite... I need to be able to post the link anywhere (on any site forum, or twitter for example) and when a user clicks on it, the link calls the lightbox script from my site and pops up the lightbox window from the 3rd party website. This project is for a script that I put on my server that contains *one input text field and a *'generate' button. I can simply paste any url / link into the input field, click 'generate' and the new short link is generated (with embedded lightbox code) and displayed on the screen for me to copy. Now, when I post that link anywhere, when clicked, it will activate the lightbox script from my site / server to pop-up the lightbox with scroll bar to view the website no matter where that link is posted online. Please take a moment to think about how you could do this and let me know your bid.