jumpURL = new Array();
imgURL  = new Array();
imgTARGET  = new Array();
altTEXT  = new Array();
jumpURL[0] = "http://www.deskwing.net/plan/option_09.html";
imgTARGET[0]  = "_self";
imgURL[0]  = "http://www.deskwing.net/banner/bnr01.gif";
altTEXT[0]  = "ねんねん割引";
n = Math.floor(Math.random()*jumpURL.length);
document.write("<a href='"+jumpURL[n]+"' target='"+imgTARGET[n]+"'>");
document.write("<img src='"+imgURL[n]+"' border='0' alt='"+altTEXT[n]+"'>");
document.write("</a>");