if (document.images) {
//���j���[
   mn_abo = new Image(); mn_abo.src = "img/mn_abo_o.gif";
   mn_ml = new Image(); mn_ml.src = "img/mn_ml_o.gif";
   mn_out = new Image(); mn_out.src = "img/mn_out_o.gif";
   mn_rep = new Image(); mn_rep.src = "img/mn_rep_o.gif";
   mn_boo = new Image(); mn_boo.src = "img/mn_boo_o.gif";
   mn_res = new Image(); mn_res.src = "img/mn_res_o.gif";
   mn_sem = new Image(); mn_sem.src = "img/mn_sem_o.gif";
   mn_lin = new Image(); mn_lin.src = "img/mn_lin_o.gif";
   mn_ms = new Image(); mn_ms.src = "img/mn_ms_o.gif";
}
function setImage(img, image) {
   if (img) {
      img.src = image;
   }
}