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/main_menu1.gif", "./images/main_menu1on.gif");
preload("link2", "./images/main_menu2.gif", "./images/main_menu2on.gif");
preload("link3", "./images/main_menu3.gif", "./images/main_menu3on.gif");
preload("link4", "./images/main_menu4.gif", "./images/main_menu4on.gif");
preload("link5", "./images/main_menu5.gif", "./images/main_menu5on.gif");

preload("link6", "./images/menu1.gif", "./images/menu1on.gif");
preload("link7", "./images/menu2.gif", "./images/menu2on.gif");
preload("link8", "./images/menu3.gif", "./images/menu3on.gif");
preload("link9", "./images/menu4.gif", "./images/menu4on.gif");
preload("link10", "./images/menu5.gif", "./images/menu5on.gif");

preload("link11", "./images/menu6.gif", "./images/menu6on.gif");

preload("link30", "./images/cms_menu0.gif", "./images/cms_menu0on.gif");
preload("link31", "./images/cms_menu1.gif", "./images/cms_menu1on.gif");
preload("link32", "./images/cms_menu2.gif", "./images/cms_menu2on.gif");
preload("link33", "./images/cms_menu3.gif", "./images/cms_menu3on.gif");
preload("link39", "./images/cms_menu9.gif", "./images/cms_menu9on.gif");