Download button problem (resolution in download button targert)

Hi I have a problem..

I want to my download button on my site downloads picture in resolution that is yours and not the original.. now i have all the resolutions down under the post. I resized them in most common resolutions, but my donwload button is pointing to URL of attachment url – but i want it to point to resolution of your computer. MySite is my site and you’ll see that i have generated resolutions under picture, and i have get resolution too.. so i need to combine those 2.. so get_your_resolution + your_resolution_image_url = Download button