function winBRopen(theURL, Name, popW, popH, scroll) { // V 1.0
var winleft = (screen.width - popW) / 2;
var winUp = (screen.height - popH) / 2;
winProp = 
'width='+popW+',height='+popH+',left='+winleft+',t op='+winUp+',scrollbars='+scroll+','
Win = window.open(theURL, 'Name', winProp)
if (parseInt(navigator.appVersion) >= 4){
Win.window.focus();
}
}