I have a form like on image below, 30 columns, it takes some time to load and it's definitely too much time, and a user can use just 3 or 4 only, so there's no need to load all the columns.
I want to show just 4 columns by default and display extra column if you want, on click of the button I think, but could be different way.
Important! I don't want to just show and hide, but actually load first 4 only first and on click load another one. So I need an effect like so:
4 columns displayed and button 'add new', when button clicked - new column appears, one click of 'add new' button and one column appears.
I think it's a jQuery job, but can't find anything like that on net.