function get_random()
{
    var ranNum= Math.floor(Math.random()*50);
    return ranNum;
}

var pics=new Array(50)
  pics[0] = "001.jpg";
  pics[1] = "002.jpg";
  pics[2] = "003.jpg";
  pics[3] = "004.jpg";
  pics[4] = "005.jpg";
  pics[5] = "006.jpg";
  pics[6] = "007.jpg";
  pics[7] = "008.jpg";
  pics[8] = "009.jpg";
  pics[9] = "010.jpg";
  pics[10] = "011.jpg";
  pics[11] = "012.jpg";
  pics[12] = "013.jpg";
  pics[13] = "014.jpg";
  pics[14] = "015.jpg";
  pics[15] = "016.jpg";
  pics[16] = "017.jpg";
  pics[17] = "018.jpg";
  pics[18] = "019.jpg";
  pics[19] = "020.jpg";
  pics[20] = "021.jpg";
  pics[21] = "022.jpg";
  pics[22] = "023.jpg";
  pics[23] = "024.jpg";
  pics[24] = "025.jpg";
  pics[25] = "026.jpg";
  pics[26] = "027.jpg";
  pics[27] = "028.jpg";
  pics[28] = "029.jpg";
  pics[29] = "030.jpg";
  pics[30] = "031.jpg";
  pics[31] = "032.jpg";
  pics[32] = "033.jpg";
  pics[33] = "034.jpg";
  pics[34] = "035.jpg";
  pics[35] = "036.jpg";
  pics[36] = "037.jpg";
  pics[37] = "038.jpg";
  pics[38] = "039.jpg";
  pics[39] = "040.jpg";
  pics[40] = "041.jpg";
  pics[41] = "042.jpg";
  pics[42] = "043.jpg";
  pics[43] = "044.jpg";
  pics[44] = "045.jpg";
  pics[45] = "046.jpg";
  pics[46] = "047.jpg";
  pics[47] = "048.jpg";
  pics[48] = "049.jpg";
  pics[49] = "050.jpg";