Topic awaiting preservation: javascript image popup with parameters

I tried modifing the guru'snetwork popup generated code to allow a variable for width and height. It's expecting ) where I'm trying to insert my height and width variables. What's wrong?

<script language="JavaScript" type="text/JavaScript">

<!-- Enable Stealth Mode to hide from really old browsers

// code courtesy of GurusNetwork.com



function openWindow(url,w,h) {

  popupWin = window.open(url,'remote','menubar=yes,toolbar=yes,titlebar=yes,status=yes,scrollbars=yes,resizable=yes,width='w',height='h);

}

// Disable Stealth Mode -->

</script>

Try this ...

popupWin = window.open(url,'remote','menubar=yes,toolbar=yes,titlebar=yes,status=yes,scrollbars=yes,resizable=yes,width=' + w + 'height=' + h);

Wow, get me ... helping someone else with JS for a change.