var AgntUsr = navigator.userAgent.toLowerCase();
var DomYes = document.getElementById ? 1 : 0;
var NavYes = AgntUsr.indexOf('mozilla') != -1 && AgntUsr.indexOf('compatible') == -1 ? 1 : 0;
var ExpYes = AgntUsr.indexOf('msie') != -1 ? 1 : 0;
var OprYes = AgntUsr.indexOf('opera') != -1 ? 1 : 0;
var Opr6OrLess = window.opera && navigator.userAgent.search(/opera.[1-6]/i) != -1; 
var DomNav = DomYes && NavYes ? 1 : 0;
var DomExp = DomYes && ExpYes ? 1 : 0;
var Nav4 = NavYes && !DomYes && document.layers ? 1 : 0;
var Exp4 = ExpYes && !DomYes && document.all ? 1 : 0;
var Linux = AgntUsr.indexOf('linux') != -1 || AgntUsr.indexOf('x11') != -1 ? 1 : 0;

function openWin(target, name, width, height, center) {
    if (NavYes && !Linux) {
        height += 27;
    }

    ypos = (screen.height - height) / 2;
    xpos = (screen.width - width) / 2;

    if (OprYes || (center && screen.height <= 600)) {
        ypos = 0;
        xpos = 0;
    }

    features = 'width='+width+',height='+ height+',top='+ypos+',left='+xpos+
                   ',scrollbars=yes,status=no,resizable=yes,outerWidth='+width+',outerHeight='+height+',screenY='+ypos+',screenX='+ xpos;
    win = window.open(target, name, features);
}