var BukkenRanking = Class.create();
BukkenRanking.prototype = {
    initialize: function() {
    },
    switchButton: function() {
        if($('display').style.display == 'none') {
            $('display').style.display = "";
            $('hide').hide();
        } else {
            $('display').hide();
            $('hide').style.display = "";
        }
    },
    changeTab: function(dispId, noDispId1, noDispId2) {
        var targetElement = $(dispId+'Tab');
        var noTargetElement1 = $(noDispId1+'Tab');
        var noTargetElement2 = $(noDispId2+'Tab');
        var noTargetChild1 = noTargetElement1.firstChild;
        var noTargetChild2 = noTargetElement2.firstChild;
        
        var targetChild = targetElement.firstChild;
        
        if(!targetChild.tagName.match(/span/i)){
            var currentMes = targetElement.innerHTML;
            Element.remove(targetChild);
            targetElement.innerHTML = '<span class="current">' + currentMes + '</span>';
            
            if(noTargetChild1.tagName.match(/span/i)){
                var removeMes1 = noTargetChild1.innerHTML;
                Element.remove(noTargetChild1);
                noTargetElement1.innerHTML = removeMes1;
            }
            if(noTargetChild2.tagName.match(/span/i)){
                var removeMes2 = noTargetChild2.innerHTML;
                Element.remove(noTargetChild2);
                noTargetElement2.innerHTML = removeMes2;
            }
        }
    }
}