function openNewWindow(mypage, myname, w, h, scroll)
{
   var LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
   var TopPosition  = (screen.height) ? (screen.height-h)/2 : 0;
   var settings     = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars=' + scroll;
   var win          = window.open(mypage,myname,settings);
}