var currentId = null;

Effect.openIt = function (contentId) {
    var slideDown = 0.1;
    var slideUp   = 0.1;

    contentId = $(contentId);
    
    if (currentId != contentId) {
        if (currentId == null) {
            new Effect.SlideDown(contentId, {duration: slideDown});
        } else {
            new Effect.SlideUp(currentId, {duration: slideUp});
            new Effect.SlideDown(contentId, {duration: slideDown});
        }
        currentId = contentId; 
    } else {
        new Effect.SlideUp(currentId, {duration: slideUp});
        currentId = null;
    }
};    

var currentBG = null;

Effect.bgSwitch = function (contentId) {
    contentId = $(contentId);
    
    if(currentBG != contentId) {
        $(contentId).setStyle({background:'url(/skin/frontend/fox/default/images/opensubnav_minus.png) no-repeat right'});
        currentBG = contentId;
    } else {
        $(contentId).setStyle({background:'url(/skin/frontend/fox/default/images/opensubnav_plus.png) no-repeat right'});
        currentBG = null;
    }
};