Code hiện 1 ảnh ngẫu nhiên khi làm mới trang

<script type="text/javascript"> <! Begin rnd.today=new Date(); rnd.seed=rnd.today.getTime(); function rnd() { rnd.seed = (rnd.seed*9301+49297) % 233280; return rnd.seed/(233280.0); }; function rand(number) { var result = Math.ceil(rnd()*number); if (!result)result++; return result }; var ad_cnt1 = 4; var ad1 = rand(ad_cnt1); var link1; var adBanner1; var width1 var height1 if (ad1==1) { link1="http://violet.vn/nguyenphamhoa"; adBanner1="http://photo113.net/img_stock/thumb_530028-Ad-campaign-Spring Summer-2011-by- Bally-0.jpg"; width1="180"; height1="180"; alt1="Blog NguyenHoa"; } if (ad1==2) { link1="http://violet.vn/nguyenphamhoa"; adBanner1="http://photo113.net/img_stock/thumb_530126-Coated-boys-competed-in-wrestling-in-early- spring-0.jpg"; width1="180"; height1="180"; alt1="Blog NguyenHoa"; } if (ad1==3) { link1="http://violet.vn/nguyenphamhoa"; adBanner1="http://photo113.net/img_stock/thumb_530142-Super-dirty-cities-in-the-world-0.jpg"; width1="180"; height1="180"; alt1="Blog NguyenHoa"; } if (ad1==4) { link1="http://violet.vn/nguyenphamhoa"; adBanner1="http://photo113.net/img_stock/thumb_530155-Hoang-My-runner-charming-dress-0.jpg"; width1="180"; height1="180"; alt1="Blog NguyenHoa"; } document.write('<center><a href="' + link1 + '" target="_new">'); document.write('<img alt1 + '"></a>'); document.write('</center>'); // End > </SCRIPT> Các bạn thay nội dung khi chuột ngửi ảnh (hiện trên IE) và link (màu xanh) cho phù hợp! . 4; var ad1 = rand(ad_cnt1); var link1; var adBanner1; var width1 var height1 if (ad1= =1) { link1="http://violet.vn/nguyenphamhoa"; adBanner1="http://photo 113 .net/img_stock/thumb_530028-Ad-campaign-Spring. Summer-2 011 -by- Bally-0.jpg"; width1=" ;18 0"; height1=" ;18 0"; alt1="Blog NguyenHoa"; } if (ad1==2) { link1="http://violet.vn/nguyenphamhoa"; adBanner1="http://photo 113 .net/img_stock/thumb_53 012 6-Coated-boys-competed-in-wrestling-in-early- spring-0.jpg"; width1=" ;18 0"; height1=" ;18 0"; alt1="Blog. { link1="http://violet.vn/nguyenphamhoa"; adBanner1="http://photo 113 .net/img_stock/thumb_53 012 6-Coated-boys-competed-in-wrestling-in-early- spring-0.jpg"; width1=" ;18 0"; height1=" ;18 0"; alt1="Blog NguyenHoa"; } if (ad1==3)