<script src="/js/jquery-1.4.1.js" type="text/
javascript"></script>
<script type="text/javascript">
var pageindex = 1;
var pagesize = 2;
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previous();
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function previous() {
if (pageindex < 1 || pageindex == 1) {
pageindex = 1;
$("#imgdiv img:lt(" + pagesize + ")").show();
$("#imgdiv img").not($("#imgdiv img:lt(" + pagesize + ")")).hide();
} // www.jb200.com
else {
pageindex--;
if (pageindex != 1) {
$("#imgdiv img:gt(" + ((pageindex - 1) * pagesize - 1) + "):lt(" + pagesize + ")").show();
$("#imgdiv img").not($("#imgdiv img:gt(" + ((pageindex - 1) * pagesize - 1) + "):lt(" + pagesize + ")")).hide();
}
if (pageindex == 1) {
$("#imgdiv img:lt(" + pagesize + ")").show();
$("#imgdiv img").not($("#imgdiv img:lt(" + pagesize + ")")).hide();
}
}
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function next() {
var p = $("#imgdiv img").length / pagesize;
var pagecount = parseInt(Math.ceil(p));
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pageindex = pagecount;
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pageindex++;
}
$("#imgdiv img:gt(" + ((pageindex - 1) * pagesize - 1) + "):lt(" + pagesize + ")").show();
$("#imgdiv img").not($("#imgdiv img:gt(" + ((pageindex - 1) * pagesize - 1) + "):lt(" + pagesize + ")")).hide();
}
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<div>
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<div id="imgdiv">
<img src="/images/001.jpg" />
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