Hoe kan ik dit wijzigen

<html>
<body>
<SCRIPT LANGUAGE="JavaScript">
function popPhoto(mypage,myname,w,h,features) {
if(screen.width){
var winl = (screen.width-w)/2;
var wint = (screen.height-h)/2;
} else { winl = 0;wint =0;}
if (winl < 0) winl = 0;
if (wint < 0) wint = 0;
var settings = height= + h + ,;
settings += width= + w + ,;
settings += top= + wint + ,;
settings += left= + winl + ,;
settings += features;
win = window.open(mypage,myname,settings);
// win.window.focus();
}
</SCRIPT>

<a href="JavaScript:popPhoto(/images/itwitter.png,Foto,660,500,)"><img src="/images/itwitter.png" class="thumbnail" /></a>
</html>

<iframe src=/muziek.php?id=542 frameborder=no align=center height = 265px width = 425px>