var command = new Array(38, 38, 40, 40, 37, 39, 37, 39, 66, 65);
var counter = 0;
var start = false;
var redirect;

function gradius(evt){
    evt = (evt) ? evt : ((event) ? event : null);

    if(evt.keyCode == command[counter]){
        counter++;
        if(counter == command.length ) {
            objs = document.getElementsByTagName('img');
            for(var i=0,m=objs.length;i<m;i++){
                //alert(objs[i].className);
                if(objs[i].className=='item'){
                    if (objs[i].style.display == 'block') {
                        objs[i].style.display = 'none';
                    } else {
                        objs[i].style.display = 'block';
                    }
                    counter = 0;
                }
            }
            tb_show('(c)2005-2009 KOEI Co., Ltd. All rights reserved. ', 'http://dol.kenjiro.net/gudoru.jpg');
        }      
    }
    else{
        counter = 0;
    }
}

document.body.onkeydown=gradius;