How to crop 80px from height?

Question

JavaScript

Hello.

Can you please tell me how to do this:

<script>
window.onload=function() {
document.getElementById("ifr").style.height=window.innerHeight+"px";
}
</script>

Subtract 80 pixels from height? That is, now the script substitutes the real height of the browser window, but it is necessary that the height of the browser be substituted minus 80 pixels.

Thanks for the help.

Answer 1

window.innerHeight-80