Your missing your JS code in the <head> section of you HTML page.
Add this:
<script language="JavaScript">
function openNewWindow(URLtoOpen, windowName, windowFeatures) { newWindow=window.open(URLtoOpen, windowName, windowFeatures); }
</script>
in-between the <head> and </head> tags of your HTML page.
Second and most glaringly is you don't need the getURL part, as the "open NewWindow does that already... just use this:
javascript:openNewWindow('http://home.iprimus.com.au/theteam/enterhome.htm','RayWhitePopup','height=5500,width=500,toolbar=no,scrollbars=no')
That should do it. :)