function zoom(prefix, c_obr, nadpis)
{

  cesta = './'+prefix+'_'+ToStr(c_obr)+'.jpg'; 

  sirka=900;
  vyska=600;

  na=window.open("","zoom","left=5,top=5,width="+sirka+",height="+vyska+","+
  "menubar=no,toolbar=no,directories=no,location=no,status=no,scrollbars=no,resiable=no");

  na.moveTo (((screen.availWidth - sirka)/2),((screen.availHeight - vyska)/2));

  with (na.document)
    {
      open ();
      writeln('<html>');
      writeln('<head>');

      writeln('<TITLE>'+nadpis+'</TITLE>');
      writeln('<link rel="stylesheet" type="text/css" href="./style.css">');

      writeln('</head>');
      writeln('<body topmargin="0" leftmargin="0" bgcolor="white" onclick="window.close()">');
      writeln('<center>');

      writeln('<table border=0 cellspacing="0" cellpadding="0" align="center" height=100% width=100%>');

      writeln('<tr><td align=center valign=middle><img border=0 src="'+cesta+'"></td></tr>');
      
      writeln('<tr><td align=center valign=middle><p>Pro zavření kliknout na obrázek</p></td></tr>');
 
      writeln('</table>'); 


      writeln('</center></body></html>');
      if (typeof(na.document) == "object") na.focus();
      close();          
    }  
}

function ToStr( num ) {
  if (num < 10) {
    return ('0' + num);
  } 
  else {
    return num;
  }
}




