var wnd;
function opendocs(url, height)
{
    width=400;
    height=450;
    l = screen.width - width - 20;
    t = screen.height - height - 150;

    if (wnd && wnd.closed == false){
        wnd.close();
        wnd = false;
    }
    if (!height){
        wnd = window.open(url, "_blank", "top="+t+",left="+l+",toolbar=0,status=0,location=0,menubar=0,directories=0,resizeable=1,scrollbars=1,width="+width);
    }else{
        wnd = window.open(url, "_blank", "top="+t+",left="+l+",toolbar=0,status=0,location=0,menubar=0,directories=0,resizeable=1,scrollbars=1,width="+width+",height="+height);
    }
}