Z-index not working

I have 2 maximenus on a page. The main menu drops behind the 2nd menu. I tried playing around with the z-index value but this has not effect. I have the params addition.

See screenshot.

Please detail exactly how to fix this.

Hi
Please check this method
forum.joomlack.fr/index.php/4-maximenu-c...d-vertical-menu#7919

CEd

Thanks for the great info. It worked!

To solve the problem with 2 maximenus on the same page and one of them is appearing underneath the other menu:

Give a higher z-index to the menu that appears below the other menu:

Z-index level: 10; position: relative

Give a lower z-index to the menu that appears above the other menu:

Z-index level: 9; position: relative


See screenshots: