function openPic(site,picx,picy,nr)
{
    x = screen.availWidth/2-picx/2;
    y = screen.availHeight/2-picy/2;
    var picWin = window.open('', nr,'width='+picx+',height='+picy+',left='+x+',top='+y+',screenX='+x+',screenY='+y+',resizable=no,scrollbars=no');
    if (picWin.closed==false) {
    picWin.window.resizeTo(picx,picy);
    }
    picWin.document.write(site);
    picWin.document.close();
}