function _volume_preload ()
{
	but_home_off = new Image();
	but_home_off.src = "pics/main_menu/home.png";
	but_home_on = new Image();
	but_home_on.src = "pics/main_menu/home1.png";
	but_orgs_off =new Image();
	but_orgs_off.src = "pics/main_menu/orgs.png";
	but_orgs_on =new Image();
	but_orgs_on.src = "pics/main_menu/orgs1.png";
	but_reg_off =new Image();
	but_reg_off.src = "pics/main_menu/reg.png";
	but_reg_on =new Image();
	but_reg_on.src = "pics/main_menu/reg1.png";
	but_electro_off=new Image();
	but_electro_off.src = "pics/main_menu/electro.png";
	but_electro_on=new Image();
	but_electro_on.src = "pics/main_menu/electro1.png";
	but_rules_off=new Image();
	but_rules_off.src = "pics/main_menu/rules.png";
	but_rules_on=new Image();
	but_rules_on.src = "pics/main_menu/rules1.png";
	but_group_off=new Image();
	but_group_off.src = "pics/main_menu/group.png";
	but_group_on=new Image();
	but_group_on.src = "pics/main_menu/group1.png";
	but_persons_off=new Image();
	but_persons_off.src = "pics/main_menu/persons.png";
	but_persons_on=new Image();
	but_persons_on.src = "pics/main_menu/persons1.png";
	but_zona_off=new Image();
	but_zona_off.src = "pics/main_menu/zona.png";
	but_zona_on=new Image();
	but_zona_on.src = "pics/main_menu/zona1.png";
	but_ant_off=new Image();
	but_ant_off.src = "pics/main_menu/ant.png";
	but_ant_on=new Image();
	but_ant_on.src = "pics/main_menu/ant1.png";
	but_pozor_off=new Image();
	but_pozor_off.src = "pics/main_menu/pozor.png";
	but_pozor_on=new Image();
	but_pozor_on.src = "pics/main_menu/pozor1.png";
	but_forum_off=new Image();
	but_forum_off.src = "pics/main_menu/forum.png";
	but_forum_on=new Image();
	but_forum_on.src = "pics/main_menu/forum1.png";
}

function _on (img_id)
{
		if (document.all)
		{
			
			eval ('document["' + img_id + '"].src = ' + img_id + '_on.src;');
		} 
		else 
		{
			eval ('document.images["' + img_id + '"].src = ' + img_id + '_on.src;');
		}
}

function _off (img_id)
{
		if (document.all)
		{
			eval ('document["' + img_id + '"].src = ' + img_id + '_off.src;');
		} 
		else 
		{
			eval ('document.images["' + img_id + '"].src = ' + img_id + '_off.src;');
		}
}

_volume_preload ();