Reset DOM After Form Action?

I have a form with two <button> elements. One button loads the page with the associated form data whilst the other triggers a download. IE6/7 does not handle <button> tags correctly. IE6 will submit all buttons regardless of which you click and uses the button content as the value, instead of the value as the value. IE7 submits just the clicked button, but still submits the content as the value, not the value.

To get around IE's issues with <button> I use JS to manipulate the DOM so hidden input fields are generated with the correct value and the button names are removed so they're not submitted at all.

This works, except in my specific situation for my download button. Because it triggers a download, the page you are on remains, and remains with the manipulated DOM, which means the form doesn't work properly anymore.

I would like to know if there's a trigger of some sort that would allow me to revert the DOM changes when the form is submitted but the page remains. I hope that makes sense. Oh, and there's no need to suggest using <input type="button" /> instead of <button>. That's not a solution.