Openning A New Window

I'm using the following code to open a new window in specified size, and I
don't want it to be located at the default position. Strangely, seems only
"top" can work. Could anyone please help me out?

<script language="jscript">

/* Open window*/
var windowHandle = ''
function popOpen(url,name,attributes) {
// windowHandle = window.open(url +escape(url),name,attributes);
windowHandle =
window.open(escape(url),name,"'left=20,top=20,width=500,height=600");
}
</script>
<A
onclick="popOpen('links2.htm');"
href="javascript:void(0);">
<IMG height=20 src="images/bullet.gif" width=21 border=0>Open Links Page
</A>