function getImages() {
    if (isIMG) {
      descBlank = new Image();
      descBlank.src = "../children/descblank.gif";
      menu1desc = new Image(); 
      menu1desc.src = "../children/books2a.gif";
      menu2desc = new Image(); 
      menu2desc.src = "../children/books2b.gif";
      menu3desc = new Image(); 
      menu3desc.src = "../children/books2c.gif";
      menu4desc = new Image(); 
      menu4desc.src = "../children/books2d.gif";
      menu5desc = new Image(); 
      menu5desc.src = "../children/books2e.gif";
      menu6desc = new Image(); 
      menu6desc.src = "../children/books2f.gif";
      menu7desc = new Image(); 
      menu7desc.src = "../children/books2g.gif";
   
    }
}

var isIMG = document.images;
getImages();

function img_act(imgName) {
    if (isIMG) {
        descimgOn = eval(imgName + "desc.src");
        document.desc.src = descimgOn;
    }
}



function img_inact(imgName) {
    if (isIMG) {
        descimgOff = descBlank.src;
        document.desc.src = descimgOff;
    }
}