use javascript for resolution, to insert adsense code

hi

can i use javascript to insert adsense code.
like this:

<script type="text/javascript" language="JavaScript">
<!-- // Inserts ADSENSE based on screen width
if (screen.width > 1024){
document.write("[COLOR="DarkRed"]ADSENSE CODE 728 x 90[/COLOR]");

}
else {
document.write("[COLOR="darkred"]ADSENSE CODE 468 x 60[/COLOR]");
}
// -->
</script>

Code (markup):

I think that it will be fine, but whats your opinion?

many tks

 

you should check with google to be sure.