BlockUI without opacity

BlockUI without opacity

I am trying to use the blockUI plugin ( http://jquery.malsup.com/block/#demos) here but I wouldn't prefer the dimming because the screen flicker. 

Can we just have the cursor changed and the screen being blocked from visual inputs but the opacity dimming/brightening is avoided?

I did try a bit of CSS trick like

            css: {
                opacity: 0.3
            }

but to no avail.