ciao ho questo script che apre una finestra che pero' non ha indietro avanti file ecc come faccio ?

codice:
<script language="javascript" type="text/javascript">



var win = null;

function NewWindow(mypage,myname,w,h,scroll){

LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;

TopPosition = (screen.height) ? (screen.height-h)/2 : 0;

settings =

'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable'

win = window.open(mypage,myname,settings)

if(win.window.focus){win.window.focus();}

}

</script>




per richiamarla :



" onclick="NewWindow(this.href,'name','750','550','y es');return false"><%=rsestrai("link")%>