var active;

function showdiv(id){ 
	if (document.getElementById){ 
		obj = document.getElementById(id);
		obj.style.visibility = "visible";
        obj.style.zIndex = 4;
	}
}

function hidediv(id){ 
    if (document.getElementById){ 
        obj = document.getElementById(id);
        obj.style.zIndex = 3;
        if (id!=active+"_active")
            obj.style.visibility = "hidden";
    }
}

function unhidediv(id){
	if (document.getElementById){ 
		obj = document.getElementById(id);
		obj.style.visibility = "";
	}
}


function change_image(id, src){
	if (document.getElementById){ 
		obj = document.getElementById(id);
        obj.src=src;
	}
}

function select_cover(id){
    if (id=="shf"){
        change_image("shf_cover", "images/music_shf.png");
        change_image("aklb_cover", "images/music_aklb_bw.png");
        change_image("db_cover", "images/music_db_bw.png");

        obj = document.getElementById("superheros_finest");
        obj.style.zIndex = 3;
        obj = document.getElementById('arriving_kings_leaving_beggars');
        if (obj.style.zIndex > 0)
            obj.style.zIndex = obj.style.zIndex - 1;
        obj = document.getElementById('dancing_bear');
        if (obj.style.zIndex > 0)
            obj.style.zIndex = obj.style.zIndex - 1;

        hidediv("db_entry");
        hidediv("aklb_entry");
        unhidediv("shf_entry");
    }
    if (id=="aklb"){
        change_image("shf_cover", "images/music_shf_bw.png");
        change_image("aklb_cover", "images/music_aklb.png");
        change_image("db_cover", "images/music_db_bw.png");

        obj = document.getElementById("superheros_finest");
        if (obj.style.zIndex > 0)
            obj.style.zIndex = obj.style.zIndex - 1;
        obj = document.getElementById('arriving_kings_leaving_beggars');
        obj.style.zIndex=3;
        obj = document.getElementById('dancing_bear');
        if (obj.style.zIndex > 0)
            obj.style.zIndex = obj.style.zIndex - 1;

        hidediv("db_entry");
        unhidediv("aklb_entry");
        hidediv("shf_entry");
    }
    if (id=="db"){
        change_image("shf_cover", "images/music_shf_bw.png");
        change_image("aklb_cover", "images/music_aklb_bw.png");
        change_image("db_cover", "images/music_db.png");

        obj = document.getElementById("superheros_finest");
        if (obj.style.zIndex > 0)
            obj.style.zIndex = obj.style.zIndex - 1;
        obj = document.getElementById('arriving_kings_leaving_beggars');
        if (obj.style.zIndex > 0)
            obj.style.zIndex = obj.style.zIndex - 1;
        obj = document.getElementById('dancing_bear');
        obj.style.zIndex=3;

        unhidediv("db_entry");
        hidediv("aklb_entry");
        hidediv("shf_entry");
    }
}


function menu_entry(id){
	var divs = document.getElementsByTagName('div');

	if ((active)&&(document.getElementById)&&(active!=id)){ 
        obj = document.getElementById(active+"_active");
	    obj.style.visibility = "hidden";
	}
    active = id;	

	for (var i = 0; i < divs.length; i++) {
		var div = divs[i];

		if (div.className=='background'){
			div.style.visibility = "hidden";
        }
        
        if (div.id==id){
			div.style.visibility = "visible";
        }

	}
}