Hello dear reader,

I have an issue with my sidebars which I use to form a background, atleast to the sides, the problem with it as in the image below shown, is that the image doesn't stretch.

I know it has to do I refered to the CSS style as height: 100%, but I wouldn't know how to fix this tbh.

The CSS code of the concerning code below:

.borders {
background-image: url('http://wow-portal.nl/divinity/img/borders.png');
background-repeat: repeat-y;
height: 100%;
margin: 0px auto;
width: 1200px;
z-index: -1;
any idea's are more than welcome