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