I'm working on an internal website at work that has dynamically-generated links to various audits (using PHP on the backend to automatically create links to today's and yesterday's reports), and now I'm adding a feature to allow user-selected dates.
I've got the code written out to update both the on-screen display and the actual HTML link itself as the user changes the dates (three drop-down menus, for year/month/day), but I'd *really* like to have the start-date selections simultaneously change the end-date selections, but not the reverse, to make it easier for people to only select a single day if they need to (or if they need to look at a smaller range, this will at least get them in











