var picwin=0;                    /* globale picwin-Variable */


/* Fenster schliessen: ------------------------------------ */
function close_picture()
{
  if (picwin)                              /* wenn existent */
    if (!picwin.closed)                  /* wenn noch offen */
      picwin.close();                            /* mach zu */
}


/* Fenster oeffnen: --------------------------------------- */
function open_picture(picname,bgcolor)
{
  close_picture();                               /* mach zu */
  if (!bgcolor)
    bgcolor="#FFFFFF";               /* Standardwert: weiss */
  picwin=open("","picwin","width=100,height=100,resizable=no,status=no,toolbar=no,menubar=no,location=no,scrollbars=no");
                                       /* Dokument oeffnen: */
  picwin.document.open("text/html","replace");
                                     /* Dokument schreiben: */
  picwin.document.write("<html>\n<head>\n");
  picwin.document.write("<title>"+picname+"</title>\n");
  picwin.document.write("</head>\n");
    /* Benachrichtigung des opener-Fensters nach dem Laden: */
  picwin.document.write("<body leftmargin=0 topmargin=0 marginheight=0 marginwidth=0 onLoad=\"opener.picture_size(window,document.images[0])\" bgcolor=\""+bgcolor+"\">\n");
                                       /* Bild reinbasteln: */
  picwin.document.write("<img src=\""+picname+"\" hspace=\"0\" vspace=\"0\">");
  picwin.document.write("</body>\n</html>");
                                    /* Dokument schliessen: */
  picwin.document.close();
}


/* Fensterdaten evaluieren und Fenstergroesse setzen: ----- */
function picture_size(picwin,image)
{
  var output;
                  /* Fenstergroesse und Fensterlage setzen: */
  picwin.resizeTo(image.width+10,image.height+29);
  picwin.moveTo((screen.width-image.width-0)/2,(screen.height-image.height-0)/2);
                                     /* Zeichenkette bauen: */
  output="src: "+image.src+"\n\n";
  output+=" width: "+image.width+"\n";
  output+="height: "+image.height+"\n";
                                      /* Fenster nach vorn: */
  picwin.focus();
}

