It is possible!
This appears to override browser settings. Hope it works for you.
<script type="text/javascript">
// Popup window code
function newPopup(url) {
popupWindow = window.open(url,'popUpWindow1','height=600,width=600,left=10,top=10,resizable=yes,scrollbars=yes,toolbar=yes,menubar=no,location=no,directories=no,status=yes')
}
</script>
<body>
<a href="JavaScript:newPopup('http://stimsonstopmotion.wordpress.com');">Try me</a>
</body>
