function photo_randam(){
jmp = new Array();
img = new Array();
jmp[0] = "http://www.jdc.co.jp/corporate/videolibrary/jp/offshore-drilling-cocntractor.html";
jmp[1] = "http://www.jdc.co.jp/corporate/videolibrary/jp/hakuryu5.html";
jmp[2] = "http://www.jdc.co.jp/corporate/videolibrary/jp/post-2.html";
jmp[3] = "http://www.jdc.co.jp/corporate/videolibrary/jp/post-1.html";
jmp[4] = "http://www.jdc.co.jp/corporate/videolibrary/jp/post.html";
img[0] = "/images/jdc_video2009-blue.jpg";
img[1] = "/images/jdc_video-deepdish.jpg";
img[2] = "/images/jdc_video-drilling1.jpg";
img[3] = "/images/jdc_video-drilling2.jpg";
img[4] = "/images/jdc_videolib.jpg";
n = Math.floor(Math.random()*jmp.length);
document.write("<a href='"+jmp[n]+"'>");
document.write("<img src='"+img[n]+"' border='0' width='830' height='70' >");
document.write("</a>");
}