function make_active(id){
document.getElementById('menu_item_'+id).className='menu_item_active';
if(document.getElementById('submenu_'+id))
document.getElementById('submenu_'+id).className='submenu_active';
}

function make_inactive(id){

	document.getElementById('menu_item_'+id).className='menu_item';
	if(document.getElementById('submenu_'+id))
	document.getElementById('submenu_'+id).className='submenu';

}
function make_sub_active(id){
document.getElementById('sub_'+id).className='submenu_link_active';
}

function make_sub_inactive(id){
document.getElementById('sub_'+id).className='submenu_link';
}