<script src="/js/jquery-1.4.1.js" type="text/javascript"></script>
<script type="text/javascript">
var pageindex = 1;
var pagesize = 2;
$(function () {
previous();
})
function previous() {
if (pageindex < 1 || pageindex == 1) {
pageindex = 1;
$("#imgdiv img:lt(" + pagesize + ")").show();
$("#imgdiv img").not($("#imgdiv img:lt(" + pagesize + ")")).hide();
}
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();
}
}
}
function next() {
var p = $("#imgdiv img").length / pagesize;
var pagecount = parseInt(Math.ceil(p));
if (pageindex + 1 > pagecount) {
pageindex = pagecount;
} else {
pageindex++;
}
$("#imgdiv img:gt(" + ((pageindex - 1) * pagesize - 1) + "):lt(" + pagesize + ")").show();
$("#imgdiv img").not($("#imgdiv img:gt(" + ((pageindex - 1) * pagesize - 1) + "):lt(" + pagesize + ")")).hide();
}
</script>
<div>
<a href="javascript:previous()">上一页</a>
<div id="imgdiv">
<img src="/images/001.jpg" alt="第一页的第一张"/>
<img src="/images/002.jpg" />
<img src="/images/003.jpg" />
<img src="/images/004.jpg" />
<img src="/images/005.jpg" />
</div>
<a href="javascript:next()">下一页</a>
</div>
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