Make background position variable

Question

I\'m using this code...

document.getElementById(\'a1\').style.backgroundPosition = \'0px 0px\';

and it works fine but is there anyway to

Answer 1

Since the background position is a string, you can just concatenate your value in.

For example:

var yValue = 20;
document.getElementById('a1').style.backgroundPosition = '0px ' + yValue + 'px';

Answer 2

var bgPos = '20px';
document.getElementById('a1').style.backgroundPosition = '0px ' + bgPos;