var objCount=0;
pics=new Array (); 

function preload(name, on, off)  {     

  pics[objCount]=new Array(3);
  pics[objCount][0]=new Image();
  pics[objCount][0].src=on;
  pics[objCount][1]=new Image();
  pics[objCount][1].src=off;
  pics[objCount][2]=name;
  objCount++;

}

function on(name) {

     for (i = 0; i < objCount; i++) {
  	if (document.images[pics[i][2]] != null) {
   		if (name != pics[i][2]) { 
    			document.images[pics[i][2]].src=pics[i][0].src;
		} 
		else document.images[pics[i][2]].src=pics[i][1].src;
    	}
     }
}

function off() {

     for (i = 0; i < objCount; i++) {
      if (document.images[pics[i][2]] != null) document.images[pics[i][2]].src=pics[i][0].src;
     }
}

preload("link1", "./images/menu_04.gif", "./images/menus_04.gif");
preload("link2", "./images/menu_05.gif", "./images/menus_05.gif");
preload("link3", "./images/menu_06.gif", "./images/menus_06.gif");
preload("link4", "./images/menu_07.gif", "./images/menus_07.gif");
preload("link5", "./images/menu_08.gif", "./images/menus_08.gif");

preload("link11", "./images/second_08.gif", "./images/seconds_08.gif");
preload("link12", "./images/second_09.gif", "./images/seconds_09.gif");
preload("link13", "./images/second_10.gif", "./images/seconds_10.gif");
preload("link14", "./images/second_11.gif", "./images/seconds_11.gif");
preload("link15", "./images/second_12.gif", "./images/seconds_12.gif");