function DCall(){
var day = new Date();
document.write(day.getYear()+"年"); 
var mm = day.getMonth()+1;
document.write(mm+"月"); 
var dd = day.getDate();
document.write(dd+"日"); 
}

function openCenterHTML(sx,sy,url){
x = ( screen.width  - sx ) / 2;y = ( screen.height - sy ) / 2;
opt = "width="+sx+",height="+sy+",left="+x+",top="+y;sub = window.open( url, "", opt );
}

function checkpw(){
var pswd = prompt("メールアドレス:","");
var pswd = prompt("パスワードを入力して下さい:","");
location.href = "download/" + pswd + ".html";
}