function popupWindow(mypage,myname,w,h,scroll){
    var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable=yes,statusbar=no'
	win = window.open(mypage,myname,winprops)
	if (parseInt(navigator.appVersion) >= 4){
        win.window.focus();
    }
}