useimg = new Array(1,2);
var tmpnum = Math.floor(Math.random() * 2);
var imgnum = useimg[tmpnum];
var imgtag = '<img src="img/banner/topimage' + imgnum +'.jpg" width="514" height="210" border="0">';
if (imgnum == 2) { var imgtag = '<a href="http://www.inrevium.jp/eng/sd/te4302.html" alt="SD UHS-I / MMC DDR�\ATA/CF BRIDGE LSI">' + imgtag + '</a>'; }
if (imgnum == 1) { var imgtag = '<a href="http://www.inrevium.jp/eng/jpeg-lsi/te3610pf.html" alt="">' + imgtag + '</a>'; }
document.write(imgtag);