Script random hiển thị ảnh ngẫu nhiên

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Demo: http://www.code1k.com/demo/2012/07/script-random-hien-thi-anh-ngau-nhien.html

<script type='text/javascript'>
var Banner1k= new Array()

Banner1k[0]="<a href='http://www.code1k.com'><img src='http://3.bp.blogspot.com/-MSHuF4IGS3A/UAkb0Z-vsjI/AAAAAAAAI9Y/WPjcvIZLz2M/s600/code1k.com-script-random-hien-thi-anh-ngau-nhien-1.jpg'/></a>"
Banner1k[1]="<a href='http://www.code1k.com'><img src='http://1.bp.blogspot.com/-G2cCtrMFpOU/UAkb1MZR0XI/AAAAAAAAI9g/z5Owc-sLneY/s600/code1k.com-script-random-hien-thi-anh-ngau-nhien-2.jpg'/></a>"
Banner1k[2]="<a href='http://www.code1k.com'><img src='http://2.bp.blogspot.com/-eATKvYCO6AA/UAkb2iDf8AI/AAAAAAAAI9o/Nr9iBOVx_ew/s600/code1k.com-script-random-hien-thi-anh-ngau-nhien-3.jpg'/></a>"
Banner1k[3]="<a href='http://www.code1k.com'><img src='http://4.bp.blogspot.com/-UxdGuthZNik/UAkb3iTpJwI/AAAAAAAAI9w/Iq3V9ykLnPQ/s600/code1k.com-script-random-hien-thi-anh-ngau-nhien-4.jpg'/></a>"
Banner1k[4]="<a href='http://www.code1k.com'><img src='http://2.bp.blogspot.com/-2JKibshReBE/UAkb4d_cNzI/AAAAAAAAI94/P_Cg7llwUOg/s600/code1k.com-script-random-hien-thi-anh-ngau-nhien-5.jpg'/></a>"
var random=Math.round(4*Math.random());

document.write(Banner1k[random]);
</script>
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