var pl, pg, aw, ah;
pl=screen.availWidth/"2";
pg=screen.availHeight/"2";
function okno(src,w,h)
{aw=pl-w/"2";
ah=pg-h/"2";
h=h+30;
w=w+20;
window.open(src, "", "height=" + h + ", width=" + w + ", resizeable=no, scrollbars=no, status=no, left=" + aw + ", top=" + ah + "")}