Style.Left += n

[YottaFlop]

What's the problem with:

document.img1.style.left += 20

? Thanks!

[mitya]

That will result in NaN, i.e. not a number. Kill the 'px'.

document.img1.style.left = parseInt(document.img1.style.left) + 20 + "px";

This assumes that style.left is set, and not empty. If it's empty, it will fail, and you'll need a condition that checks this (and uses 0 for the calculation if so) or gets the left some other way, e.g. .offsetLeft).

[YottaFlop]

You're good.

Thanks.