//usage: <a href="#" onclick="winBRopen('page.html','popwin','750','500','no');return false;"></a>

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+',top='+winUp+',scrollbars='+scroll+',resizable'
Win = window.open(theURL, Name, winProp)
if (parseInt(navigator.appVersion) >= 4) { Win.window.focus(); }
}