var last_menu = "";

function change_tag(id)
{
    $(id + '_fondo').removeClassName('item_selector_off');
    $(id + '_fondo').addClassName('item_selector_over');


    $(id + '_arrow').removeClassName('menu_arrow');
    $(id + '_arrow').addClassName('menu_arrow_image');
}


function change_tag_out( id ){
    if (id == last_menu )
	return;

    $(id + '_fondo').removeClassName('item_selector_over');
    $(id + '_fondo').addClassName('item_selector_off');

    $(id + '_arrow').removeClassName('menu_arrow_image');
    $(id + '_arrow').addClassName('menu_arrow');
}


function disable_tag( id ){
    $(id + '_fondo').removeClassName('item_selector_over');
    $(id + '_fondo').addClassName('item_selector_off');

    $(id + '_arrow').removeClassName('menu_arrow_image');
    $(id + '_arrow').addClassName('menu_arrow');
}

function cr_showHideLayer( id, option, sub ){
    if (option == 'hide'){
	$(id).hide();
    } else {
	$(id).show();
    }
}

function cr_top(id, sub){

    if ( last_menu != "" ){

	if ( id != last_menu ){
	    disable_tag(last_menu);
	    cr_showHideLayer(last_menu+'_subnav', 'hide' );
	    last_menu = id;
	} else {
	    disable_tag(last_menu);
	    cr_showHideLayer(last_menu+'_subnav', 'hide' );
	    last_menu = "";
	    return;
	}
    } else {
	last_menu = id;
    }
    change_tag(id);
    if ( sub == 'sub' )
	cr_showHideLayer(id+'_subnav', 'show');
}

function open_url( url ){
    window.location = url;
}