preload_image_object = new Image();
  // set image url
  image_url = new Array();
  image_url[0] = "../collection/pieces/albert.jpg";
  image_url[1] = "../collection/materials/mat_albert.jpg";
  image_url[2] = "../collection/design/design_albert.jpg";
  image_url[3] = "../collection/titles/title_albert.jpg";
  
  image_url[4] = "../collection/pieces/amy.jpg";
  image_url[5] = "../collection/materials/mat_amy.jpg";
  image_url[6] = "../collection/design/design_amy.jpg";
  image_url[7] = "../collection/titles/title_amy.jpg";
  
  image_url[8] = "../collection/pieces/david.jpg";
  image_url[9] = "../collection/materials/mat_david.jpg";
  image_url[10] = "../collection/design/design_david.jpg";
  image_url[11] = "../collection/titles/title_david.jpg";
  
  image_url[12] = "../collection/pieces/elizabeth.jpg";
  image_url[13] = "../collection/materials/mat_elizabeth.jpg";
  image_url[14] = "../collection/design/design_elizabeth.jpg";
  image_url[15] = "../collection/titles/title_elizabeth.jpg";
  
  image_url[16] = "../collection/pieces/fortune.jpg";
  image_url[17] = "../collection/materials/mat_fortune.jpg";
  image_url[18] = "../collection/design/design_fortune.jpg";
  image_url[19] = "../collection/titles/title_fortune.jpg";
  
  image_url[20] = "../collection/pieces/isadore.jpg";
  image_url[21] = "../collection/materials/mat_isadore.jpg";
  image_url[22] = "../collection/design/design_isadore.jpg";
  image_url[23] = "../collection/titles/title_isadore.jpg";
  
  image_url[24] = "../collection/pieces/jeanette.jpg";
  image_url[25] = "../collection/materials/mat_jeanette.jpg";
  image_url[26] = "../collection/design/design_jeanette.jpg";
  image_url[27] = "../collection/titles/title_jeanette.jpg";
  
  image_url[28] = "../collection/pieces/lori.jpg";
  image_url[29] = "../collection/materials/mat_lori.jpg";
  image_url[30] = "../collection/design/design_lori.jpg";
  image_url[31] = "../collection/titles/title_lori.jpg";
  
  image_url[32] = "../collection/pieces/ninette.jpg";
  image_url[33] = "../collection/materials/mat_ninette.jpg";
  image_url[34] = "../collection/design/design_ninette.jpg";
  image_url[35] = "../collection/titles/title_ninette.jpg";
  
  image_url[36] = "../collection/pieces/odette.jpg";
  image_url[37] = "../collection/materials/mat_odette.jpg";
  image_url[38] = "../collection/design/design_odette.jpg";
  image_url[39] = "../collection/titles/title_odette.jpg";
  
  image_url[40] = "../collection/pieces/rosemary.jpg";
  image_url[41] = "../collection/materials/mat_rosemary.jpg";
  image_url[42] = "../collection/design/design_rosemary.jpg";
  image_url[43] = "../collection/titles/title_rosemary.jpg";
  
  image_url[44] = "../collection/pieces/samuel.jpg";
  image_url[45] = "../collection/materials/mat_samuel.jpg";
  image_url[46] = "../collection/design/design_samuel.jpg";
  image_url[47] = "../collection/titles/title_samuel.jpg";
  
  image_url[48] = "../collection/pieces/sarah.jpg";
  image_url[49] = "../collection/materials/mat_sarah.jpg";
  image_url[50] = "../collection/design/design_sarah.jpg";
  image_url[51] = "../collection/titles/title_sarah.jpg";
  
  image_url[52] = "../collection/pieces/sheila.jpg";
  image_url[53] = "../collection/materials/mat_sheila.jpg";
  image_url[54] = "../collection/design/design_sheila.jpg";
  image_url[55] = "../collection/titles/title_sheila.jpg";
  
  image_url[56] = "../collection/pieces/silvia.jpg";
  image_url[57] = "../collection/materials/mat_silvia.jpg";
  image_url[58] = "../collection/design/design_silvia.jpg";
  image_url[59] = "../collection/titles/title_silvia.jpg";
  
  image_url[60] = "../collection/pieces/susan.jpg";
  image_url[61] = "../collection/materials/mat_susan.jpg";
  image_url[62] = "../collection/design/design_susan.jpg";
  image_url[63] = "../collection/titles/title_susan.jpg";
  
  image_url[64] = "../collection/pieces/waza.jpg";
  image_url[65] = "../collection/materials/mat_waza.jpg";
  image_url[66] = "../collection/design/design_waza.jpg";
  image_url[67] = "../collection/titles/title_waza.jpg";

   var i = 0;
	var preloaded = new Array();
    for (var i = 0; i < 67; i++){
        preloaded[i] = document.createElement('img');
        preloaded[i].setAttribute('src',image_url[i]);
    };