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+',toolbar=no,status=no,resizable=yes'
    win = window.open(mypage,myname,settings)
    if(win.window.focus){win.window.focus();}
}