Show HN: My side project, Instant Visual Search for Etsy.
I really hope it doesn't need an explanation, but start typing what you're looking for. I used tags on the listings (among other things) to fuel my suggestions. Click a color to filter on those listings, click to sort on price. Click again to deselect.
I've tested on the latest Firefox, Chrome and IE on Windows and Safari on an iPad. You will need JavaScript to run this as it is. I plan to build a no script (and non-instant) version later.
If I have a tl;dr from all this, it's "use jQuery" I've rolled AJAX/JavaScript apps by hand before and was really amazed at what jQuery enabled me to do so rapidly.