Already in DB check

The idea:
Imagine that I already have in a site an item called "Peugeot 208 sli tdi ers" .
Now I have 6 users with the permission to submit content in the site. Because some user are not intelligent and will check in that content already exists I would to see BELLOW the TITLE of the item an ajax search that would tell the user that "that content in already submitted".

Would love to see next to that list of 5 items a magnifier glass that could show a pop-up with the details and all fields of that content, only if it has permission.

I have seen this in forum, user voice and other apps.

This is a very nice feature. Please consider.

Which Ajax search do you use?

You mean the search to be displayed inside the content item form?

Yes when SUBMITTING, that is exactly it:
ideas.joomla.org/forums/84261-joomla-idea-pool

when you try to post the input search in the database.

Yes it had to be ajax.

We can use jquery for this,

most of the code is already available by our auto-complete implementation for search tags

just i must check if it possible to use auto-complete not inside title but in a separate element box

because in our case we only want to list the matching item that have title that contain the currently written text in the title

then there are implications like to search all categories or all content types , etc

I see that you get the idea, and I understand the implication on this.

Glad you are thinking in it and considering. Not sure if it is a strait foward implementation.