var totalImages = 11; // Total images used

if(document.images){
     mFX = new Array(totalImages);
     for(i = 0; i < mFX.length; i++){
          mFX[i] = new Image();
          }
     mFX[0].src = "images/categories_food.jpg";
     mFX[1].src = "images/categories_gender.jpg";
     mFX[2].src = "images/categories_gift.jpg";
     mFX[3].src = "images/categories_homestay.jpg";
	 mFX[4].src = "images/categories_marriage.jpg";
	 mFX[5].src = "images/categories_college.jpg";
	 mFX[6].src = "images/categories_keitai.jpg";
	 mFX[7].src = "images/categories_kyooiku.jpg";
	 mFX[8].src = "images/categories_popculture.jpg";
	 mFX[9].src = "images/categories_learningjapanese.jpg";
	 mFX[10].src = "images/categories_crosscultural.jpg";
     }

function imgFX(img, num){
     if(document.images){
          document.images[img].src = mFX[num].src;
          }
     }