//今日の日付
var today=new Date();

var s0719 = new Date(today.getFullYear(),6,19);
var e0721 = new Date(today.getFullYear(),6,21);
var s0902 = new Date(today.getFullYear(),8,2);
var e0903 = new Date(today.getFullYear(),8,4);
var s0920 = new Date(today.getFullYear(),8,20);
var e0922 = new Date(today.getFullYear(),8,22);

var myHTML_s0719e0721="<p class=img><img src=common/img/20110719.jpg border=0></p>";
var myHTML_s0902e0903="<p class=img><img src=common/img/20110902.jpg border=0></p>";
var myHTML_s0920e0922="<p class=img><img src=common/img/20110920.jpg border=0></p>";

if(today.getTime()>= s0719.getTime() && today.getTime() <e0721.getTime() ){
document.write(myHTML_s0719e0721)
}

if(today.getTime()>= s0902.getTime() && today.getTime() <e0903.getTime() ){
document.write(myHTML_s0902e0903)
}

if(today.getTime()>= s0920.getTime() && today.getTime() <e0922.getTime() ){
document.write(myHTML_s0920e0922)
}