obrazek = new Array(20);

obrazek[0] = 'jpg_title/title1.jpg" width="260" height="373"';
obrazek[1] = 'jpg_title/title2.jpg" width="330" height="276"';
obrazek[2] = 'jpg_title/title3.jpg" width="260" height="367"';
obrazek[3] = 'jpg_title/title4.jpg" width="360" height="266"';
obrazek[4] = 'jpg_title/title5.jpg" width="360" height="261"';
obrazek[5] = 'jpg_title/title6.jpg" width="360" height="300"';
obrazek[6] = 'jpg_title/title7.jpg" width="180" height="360"';
obrazek[7] = 'jpg_title/title8.jpg" width="415" height="230"';
obrazek[8] = 'jpg_title/title9.jpg" width="360" height="268"';
obrazek[9] = 'jpg_title/title10.jpg" width="390" height="275"';
obrazek[10] = 'jpg_title/title11.jpg" width="390" height="358"';
obrazek[11] = 'jpg_title/title12.jpg" width="390" height="399"';
obrazek[12] = 'jpg_title/title13.jpg" width="410" height="310"';
obrazek[13] = 'jpg_title/title14.jpg" width="390" height="247"';
obrazek[14] = 'jpg_title/title15.jpg" width="410" height="279"';
obrazek[15] = 'jpg_title/title16.jpg" width="410" height="310"';
obrazek[16] = 'jpg_title/title17.jpg" width="400" height="296"';
obrazek[17] = 'jpg_title/title18.jpg" width="288" height="380"';
obrazek[18] = 'jpg_title/title19.jpg" width="295" height="390"';
obrazek[19] = 'jpg_title/title20.jpg" width="400" height="311"';

index_obr = Math.floor(Math.random() * obrazek.length);