How to implement multiselect with Spanish. jQuery in asp.net mvc?

Question

JavaScript

Hello. You need to pass several categories through the form at once, an example is like here: i3.asp.net/media/3121858/p1-canada-china-japan.png...

I tried to do it as shown here www.asp.net/mvc/tutorials/ javascript/working-with-...
The test project that they say to download for example has been removed, if done from 0, then the campaign is very superficially described, half of the code is not shown at all...