function getImages() {
    if (isIMG) {
      booksmenu1on = new Image(); 
      booksmenu1off = new Image();  
      booksmenu1off.src = "../books/booksmenu1.gif";
      booksmenu1on.src = "../books/booksmenu1alt.gif";
      booksmenu2on = new Image(); 
      booksmenu2off = new Image();  
      booksmenu2on.src = "../books/booksmenu2alt.gif";
      booksmenu2off.src = "../books/booksmenu2.gif";
      booksmenu3on = new Image(); 
      booksmenu3off = new Image();  
      booksmenu3on.src = "../books/booksmenu3alt.gif";
      booksmenu3off.src = "../books/booksmenu3.gif";
      booksmenu4on = new Image(); 
      booksmenu4off = new Image();  
      booksmenu4on.src = "../books/booksmenu4alt.gif";
      booksmenu4off.src = "../books/booksmenu4.gif";
      booksmenu5on = new Image(); 
      booksmenu5off = new Image();  
      booksmenu5on.src = "../books/booksmenu5alt.gif";
      booksmenu5off.src = "../books/booksmenu5.gif";
	  booksmenu6on = new Image(); 
      booksmenu6off = new Image();  
      booksmenu6on.src = "../books/booksmenu6alt.gif";
      booksmenu6off.src = "../books/booksmenu6.gif";
      booksmenu7on = new Image(); 
      booksmenu7off = new Image();  
      booksmenu7on.src = "../books/booksmenu7alt.gif";
      booksmenu7off.src = "../books/booksmenu7.gif";

    }
}

var isIMG = document.images;
getImages();

function img_act(imgName) {
    if (isIMG) {
        imgOn = eval(imgName + "on.src");
        document [imgName].src = imgOn;
    }
}



function img_inact(imgName) {
    if (isIMG) {
        imgOff = eval(imgName + "off.src");
        document [imgName].src = imgOff;
    }
}