var BestSellers = function(){
    var currentEl = null;
    
    function setText(id, text){
        var el = document.getElementById(id);
        if(el) el.innerHTML = text;
    }
    
    return {
        showTopSellerInfo : function(num) {
            if(currentEl){
                currentEl.style.display = "none";
                currentEl.style.left = "0";
                currentEl.parentNode.style.zIndex = "";
            }
            if(num != undefined){
                var el = document.getElementById("topseller_" + num);
                if(el){
                    el.parentNode.style.zIndex = 1;
                    el.style.display = "block";
                    el.style.top = "-20px";
                    el.style.left = "-242px";
                    currentEl = el;
                }
            }
        }
    }
}();

document.onclick = BestSellers.showTopSellerInfo;