var num_of_groups = 19;
var imgGroup = new Array();

var imgTotal = new Array(num_of_groups+1);
var imgCurrent = new Array(num_of_groups+1);
for(i = 0; i<num_of_groups+1; i++){
	imgTotal[i] = 0;
	imgCurrent[i] = 0;
}

imgGroup[1] = new Array();
imgGroup[1][imgTotal[1]++] = 'imgs/clayA.jpg';
imgGroup[1][imgTotal[1]++] = 'imgs/clayE.jpg';
imgGroup[1][imgTotal[1]++] = 'imgs/clayO.jpg';
imgGroup[1][imgTotal[1]++] = 'imgs/clayI.jpg';
imgGroup[1][imgTotal[1]++] = 'imgs/clayU.jpg';

imgGroup[2] = new Array();
imgGroup[2][imgTotal[2]++] = 'imgs/gm1.jpg';
imgGroup[2][imgTotal[2]++] = 'imgs/gm2.jpg';
imgGroup[2][imgTotal[2]++] = 'imgs/gm3.jpg';

imgGroup[3] = new Array();
imgGroup[3][imgTotal[3]++] = 'imgs/goldNeck.jpg';
imgGroup[3][imgTotal[3]++] = 'imgs/goldNeck2.jpg';
imgGroup[3][imgTotal[3]++] = 'imgs/goldNeck4.jpg';

imgGroup[4] = new Array();
imgGroup[4][imgTotal[4]++] = 'imgs/Duality1.jpg';
imgGroup[4][imgTotal[4]++] = 'imgs/Duality2.jpg';

imgGroup[5] = new Array();
imgGroup[5][imgTotal[5]++] = 'imgs/sabonBk2.jpg';
imgGroup[5][imgTotal[5]++] = 'imgs/sabonBk5.jpg';
imgGroup[5][imgTotal[5]++] = 'imgs/sabonBk4.jpg';
imgGroup[5][imgTotal[5]++] = 'imgs/sabonBk.jpg';

imgGroup[6] = new Array();
imgGroup[6][imgTotal[6]++] = 'imgs/field2.jpg';
imgGroup[6][imgTotal[6]++] = 'imgs/field.jpg';

imgGroup[7] = new Array();
imgGroup[7][imgTotal[7]++] = 'imgs/metalchair.jpg';
imgGroup[7][imgTotal[7]++] = 'imgs/metalchair2.jpg';

imgGroup[8] = new Array();
imgGroup[8][imgTotal[8]++] = 'imgs/Tfront.jpg';
imgGroup[8][imgTotal[8]++] = 'imgs/Tback.jpg';

imgGroup[9] = new Array();
imgGroup[9][imgTotal[9]++] = 'imgs/grid1.jpg';
imgGroup[9][imgTotal[9]++] = 'imgs/grid3.jpg';
imgGroup[9][imgTotal[9]++] = 'imgs/grid4.jpg';

imgGroup[10] = new Array();
imgGroup[10][imgTotal[10]++] = 'imgs/type2.jpg';
imgGroup[10][imgTotal[10]++] = 'imgs/type3.jpg';
imgGroup[10][imgTotal[10]++] = 'imgs/type1.jpg';
imgGroup[10][imgTotal[10]++] = 'imgs/type4.jpg';

imgGroup[11] = new Array();
imgGroup[11][imgTotal[11]++] = 'imgs/jayJay.jpg';
imgGroup[11][imgTotal[11]++] = 'imgs/jayBack.jpg';

imgGroup[12] = new Array();
imgGroup[12][imgTotal[12]++] = 'imgs/philth.jpg';
imgGroup[12][imgTotal[12]++] = 'imgs/philth1.jpg';
imgGroup[12][imgTotal[12]++] = 'imgs/philth2.jpg';
imgGroup[12][imgTotal[12]++] = 'imgs/philth3.jpg';
imgGroup[12][imgTotal[12]++] = 'imgs/philth4.jpg';

imgGroup[13] = new Array();
imgGroup[13][imgTotal[13]++] = 'imgs/sketch4.jpg';
imgGroup[13][imgTotal[13]++] = 'imgs/sketch2.jpg';
imgGroup[13][imgTotal[13]++] = 'imgs/sketch3.jpg';
imgGroup[13][imgTotal[13]++] = 'imgs/sketch5.jpg';
imgGroup[13][imgTotal[13]++] = 'imgs/sketch1.jpg';

imgGroup[14] = new Array();
imgGroup[14][imgTotal[14]++] = 'imgs/sketch7.jpg';
imgGroup[14][imgTotal[14]++] = 'imgs/sketch19.jpg';
imgGroup[14][imgTotal[14]++] = 'imgs/sketch20.jpg';

imgGroup[15] = new Array();
imgGroup[15][imgTotal[15]++] = 'imgs/sketch17.jpg';
imgGroup[15][imgTotal[15]++] = 'imgs/sketch8.jpg';
imgGroup[15][imgTotal[15]++] = 'imgs/sketch15.jpg';
imgGroup[15][imgTotal[15]++] = 'imgs/sketch16.jpg';
imgGroup[15][imgTotal[15]++] = 'imgs/sketch18.jpg';

imgGroup[16] = new Array();
imgGroup[16][imgTotal[16]++] = 'imgs/PreEnv.jpg';
imgGroup[16][imgTotal[16]++] = 'imgs/PreCardBack.jpg';
imgGroup[16][imgTotal[16]++] = 'imgs/PreTrio.jpg';
imgGroup[16][imgTotal[16]++] = 'imgs/PreLogo.jpg';

imgGroup[17] = new Array();
imgGroup[17][imgTotal[17]++] = 'imgs/Escure3.jpg';
imgGroup[17][imgTotal[17]++] = 'imgs/Escure2.jpg';
imgGroup[17][imgTotal[17]++] = 'imgs/Escure.jpg';

imgGroup[18] = new Array();
imgGroup[18][imgTotal[18]++] = 'imgs/tile1.jpg';
imgGroup[18][imgTotal[18]++] = 'imgs/tile2.jpg';

imgGroup[19] = new Array();
imgGroup[19][imgTotal[19]++] = 'imgs/Degree1.jpg';
imgGroup[19][imgTotal[19]++] = 'imgs/Degree2.jpg';
imgGroup[19][imgTotal[19]++] = 'imgs/Degree3.jpg';
imgGroup[19][imgTotal[19]++] = 'imgs/Degree4.jpg';

function nextImg(groupnum) {
imgCurrent[groupnum]++;
  if (imgCurrent[groupnum] >= imgTotal[groupnum]) imgCurrent[groupnum] = 0; {
	  document.getElementById("rollimg"+groupnum).src = imgGroup[groupnum][imgCurrent[groupnum]];
  }
  document.getElementById('holderNum'+groupnum).innerHTML = (imgCurrent[groupnum]+1);
}
function prevImg(groupnum) {
imgCurrent[groupnum]--;
  if (imgCurrent[groupnum] < 0) imgCurrent[groupnum] = imgTotal[groupnum]-1; {
	  document.getElementById("rollimg"+groupnum).src = imgGroup[groupnum][imgCurrent[groupnum]];
  }
  document.getElementById('holderNum'+groupnum).innerHTML = (imgCurrent[groupnum]+1);
}