function StringArray (n) {
  this.length = n;
  for (var i =1; i <= n; i++) {
    this[i] = ' ' }
}

// ************ zadefinovanie obrazkov ************

coverImage = new StringArray(43)
coverImage[0] = 'banner_04.jpg';
coverImage[1] = 'banner_01.jpg';
coverImage[2] = 'banner_02.jpg';
coverImage[3] = 'banner_03.jpg';
coverImage[4] = 'banner_04.jpg';
coverImage[5] = 'banner_05.jpg';
coverImage[6] = 'banner_06.jpg';
coverImage[7] = 'banner_07.jpg';
coverImage[8] = 'banner_08.jpg';
coverImage[9] = 'banner_09.jpg';
coverImage[10] = 'banner_10.jpg';
coverImage[11] = 'banner_11.jpg';
coverImage[12] = 'banner_12.jpg';
coverImage[13] = 'banner_13.jpg';
coverImage[14] = 'banner_14.jpg';
coverImage[15] = 'banner_15.jpg';
coverImage[16] = 'banner_16.jpg';
coverImage[17] = 'banner_17.jpg';
coverImage[18] = 'banner_18.jpg';
coverImage[19] = 'banner_19.jpg';
coverImage[20] = 'banner_20.jpg';
coverImage[21] = 'banner_21.jpg';
coverImage[22] = 'banner_22.jpg';
coverImage[23] = 'banner_23.jpg';
coverImage[24] = 'banner_24.jpg';
coverImage[25] = 'banner_25.jpg';
coverImage[26] = 'banner_26.jpg';
coverImage[27] = 'banner_27.jpg';
coverImage[28] = 'banner_28.jpg';
coverImage[29] = 'banner_29.jpg';
coverImage[30] = 'banner_30.jpg';
coverImage[31] = 'banner_31.jpg';
coverImage[32] = 'banner_32.jpg';
coverImage[33] = 'banner_33.jpg';
coverImage[34] = 'banner_34.jpg';
coverImage[35] = 'banner_35.jpg';
coverImage[36] = 'banner_36.jpg';
coverImage[37] = 'banner_37.jpg';
coverImage[38] = 'banner_38.jpg';
coverImage[39] = 'banner_39.jpg';
coverImage[40] = 'banner_40.jpg';
coverImage[41] = 'banner_41.jpg';
coverImage[42] = 'banner_42.jpg';

// ************************************************

function randomCoverImageArea() {
    random_num = (Math.round((Math.random()*42)));
    return(coverImage[random_num]);
}
var randomResult = randomCoverImageArea();

function writeRandomCoverImage() {
document.write("<img src=\"images/"+randomResult+"\" width=\"889\" height=\"150\" alt=\"\" />");
}