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)
        }