Perhaps something like this is what you’re looking for?
FacetWP – Faceted Search for WordPress
Intelligent filtering for eCommerce, resource libraries, search pages and more
If the core product isn’t enough, there are also add-ons. Play with the demo and see if it’s sufficient.https://facetwp.com/
I think that you’ll get more replies here if you at least provide whether the script needs to be a standalone script (JS, PHP, etc alone) or a complete / comprehensive plugin for a platform like WordPress. Likely no can give you any useful suggestions until you have provided this basic information. If that’s because you don’t even yet know what you’re (going to be) using (haven’t decided), then you should take the time to decide that first (and come back later).
For example, if you said -“We’re using WordPress.” then I could say, try this…
Mailpoet – http://www.mailpoet.com/
Cheaper isn’t always better. At least that’s what I found out when trying Ninja Demo. To be fair though, that was right when v1.0 had launched. I reported the issues I had but haven’t re-reviewed it since.
It’s not clear what you think the menu plugin isn’t capable of doing. I don’t see anything it’s incapable of. All I see is that the links to demos you’ve provided display different menu implementations. Neither demo is an exhaustive demostration of all features.
If you can more specifically articulate your needs then I’m pretty sure the author could tell you more definitively whether it’s possible or not to do what you are wanting.
You can contact the author here (may need to scroll down to see the Email field) – http://codecanyon.net/user/codetemp?WT.ac=item_profile_text&WT.z_author=codetemp
If it’s not immediately possible, it’s also pretty the likely that it could be make to work how you want after purchase. In any event, good luck!
@CustomizeWP – The item you’ve suggested hasn’t been updated for over a year. It wouldn’t be something I’d recommend to anyone. Such inactivity (to me) is indicative of lack of time / passion for the item. I also see that you commented on that same item months ago but have yet to purchase it. Any particular reason(s) why?
I’d recommend Suppa Menu to you – http://codecanyon.net/item/suppa-multipurpose-wordpress-mega-menu/7265033
I’ve already use them for several projects (including my own). I really like this payment processor.
Perhaps Envato now will consider offering this as a (better) alternative to PayPal / Skrill?
Would you use it if they did?
May I ask why is that?
While iframes aren’t inherently bad, I feel they’re often misused. This is not an exhaustive list but here’s some reasons.They can be bad for SEO as how search engines crawl them will differ in effectiveness. Linking to or bookmarking them is not ideal. They can make debugging issues more difficult. You also don’t have control of the code that executes in the iFrame should it become problematic as you would if it was running from your own.