var win = null;
function NewWindow(mypage,myname,w,h,scroll,toolbar){
LeftPosition = (screen.width) ? ((screen.width-w)/2)-10 : 0;
TopPosition = (screen.height) ? ((screen.height-h)/2)-20 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',toolbar='+toolbar+',resizable'
win = window.open(mypage,myname,settings)
if (focus) win.focus()
}