1) Insert this Javascript into the head of your HTML file:
<script language="JavaScript">
<!--
function openWin (fname,h,w,x,y)
{
var win = window.open(fname,"",'scrollbars,resizable,height='+h+',width='+w+',left='+x+',top='+y+',screenX='+x+',screenY='+y+'');
win.focus()
}
//-->
</script>
2) Create a link which calls the Javascript function with its parameters to open the new window.
For example:
<a href="javascript:openWin('index.html',500,600,0,0)">
(0,0) are the coordinates for the top, left of the screen.