in the head (or top of your code)
CODE
<!-- begin code provided by createblog.com -->
<script language="JavaScript"><!--
function P(url,h,w) { // (url,height,width)
var p = "height=" + h + ",width=" + w + ",scrollbars=yes";
window.open(url,"",p);
} // -->
</script>
<!-- end code provided by createblog.com -->
dont change anything on that..
for the links:
QUOTE
<a href="java script:P('site.htm',height,width)">text</a>
change the site.htm, and height and width, in pixels.