function movepic(img_name,img_src) {
     document[img_name].src=img_src;
}
function Img_New (name){
  this.on = new Image();
  this.on.src = name;
}
Img_New('/img/menu1_1.gif');
Img_New('/img/menu1_2.gif');
Img_New('/img/menu1_3.gif');
Img_New('/img/menu1_4.gif');
Img_New('/img/menu1_5.gif');
Img_New('/img/menu1_6.gif');
Img_New('/img/menu1_7.gif');
Img_New('/img/menu2_1.gif');
Img_New('/img/menu2_2.gif');
Img_New('/img/menu2_3.gif');
Img_New('/img/menu2_4.gif');
Img_New('/img/menu2_5.gif');
Img_New('/img/menu2_6.gif');
Img_New('/img/menu2_7.gif');