<!--
var imgMax  = 4; //セットする画像の枚数。
var imgRand = Math.floor(Math.random() * imgMax);

if(imgRand == 0)       document.write('<img src="/img/head_img1.jpg" width="780" height="137" style="margin:0;padding:0;" />');
else if(imgRand == 1)  document.write('<img src="/img/head_img2.jpg" width="780" height="137" style="margin:0;padding:0;" />');
else if(imgRand == 2)  document.write('<img src="/img/head_img3.jpg" width="780" height="137" style="margin:0;padding:0;" />');
else if(imgRand == 3)  document.write('<img src="/img/head_img4.jpg" width="780" height="137" style="margin:0;padding:0;" />');
//-->
