曜日に応じてヘッダーの画像を切り替える(changing of header per day)

gistfile1.js

<!--Changing of header start-->
<!--Sorry,Comments of this program is written in Japanese.-->

<script type="text/javascript">
<!--
today = new Date();

/*rand関数に乱数を加えてみても面白そうです。*/

var rand = today.getDay();
var headerarea = document.getElementById("header");

/*0が日曜、6が金曜をいう感じです。リンクが同じ場合は、
配列などを用いてもよさそうです。*/

if(rand == 0){
headerarea.innerHTML = ('<a href=""><img src=""></a>');
}

else if(rand == 1){
headerarea.innerHTML = ('<a href=""><img src=""></a>');
}

else if(rand == 2){
headerarea.innerHTML = ('<a href=""><img src=""></a>');
}

else if(rand == 3){
headerarea.innerHTML = ('<a href=""><img src=""></a>');
}

else if(rand == 4){
headerarea.innerHTML = ('<a href=""><img src=""></a>');
}

else if(rand == 5){
headerarea.innerHTML = ('<a href=""><img src=""></a>');
}

else if(rand == 6){
headerarea.innerHTML = ('<a href=""><img src=""></a>');
}


// -->
</script>
<!--Changing of header end-->