3 shows and clickable under links

[joon1]

I have 3 hideS and 3 showS at http://form.kr/q/centerButton05/
The 3 hideS and showS are buttons.
The page works like the quote below

If you click hide left button, #left will be disappeared.
If you click hide center button, #center will be disappeared.
If you click hide right button, #right will be disappeared.

The 3 hide buttons above work fine.

Adding to the quote above, I like to make the page like the quote below.

When the page is loading, the none of 3 DIVs is NOT shown.

(1) If you click “show1”, “show2”, or “show3” when none of 3 DIVs is not shown, the DIV1, DIV2 or DIV3 is shown
(1-1) If you click the “show1”, “show2” or “show3” again after the DIV1, DIV2, or DIV3 is shown, the DIV1, DIV2 or DIV3 is disappeared. So none of 3 DIVs is shown.
(1-2) If you click “show2” or “show3” after DIV1 is shown, the DIV1 is disappeared and the DIV2 or DIV3 is shown.

(2) When any of 3 DIVs is shown, it is located at below the center box which is cornsilk background and under the button “show2”.

(3) If you click the hide center, not only the center box which is cornsilk background but also DIV1, DIV2, or DIV3 is disappeared.