var st = 0;
var w = 0;
var h = 0;

function deadCenter(w,h,url,sn) {
        if (window.screen) {
var chasm = screen.availWidth;
var mount = screen.availHeight;
putItThere = window.open(url,sn,'width=' + w + ',height=' + h + ',status=' + st + ',left=' + ((chasm - w - 10) * .5) + ',top=' + ((mount - h - 30) * .5));
        }
}