popup:

http://www.quirksmode.org/js/popup.html

<script language="javascript" type="text/javascript">
<!--
function popitup(url) {
	newwindow=window.open(url,'name','height=200,width=150');
	if (window.focus) {newwindow.focus()}
	return false;
}

// -->
</script>


<a href="popupex.html" onclick="return popitup('popupex.html')"
	>Link to popup</a>