js代码：
<script type="text/javascript">
$(function(){
var aLazy = $('.lazy');
aLazy.each(function(i){
$(this).attr({
"opacity":0
});
});
function getSrc(){
aLazy.each(function(i){
$(this).attr('src',$(this).attr('data-original')).animate({
"opacity":1
});
});
};
function int(){
var oScrH = $(document).scrollTop();
aLazy.each(function(i){
var oEleTop = $(this).offset().top;
if(oScrH+oWinH>oEleTop) {
setTimeout(function(){
getSrc();
},200);
}
});
};
var oWinH = $(window).height();
$(window).bind('scroll',int)
});
</script>
html代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>延时加载</title>
<link rel="stylesheet" type="text/css" href="index.css" />
</head>
<body>
<div id="main">
<p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p><p>1</p>
<div id="photo">
<dl>
<dt><img data-original="images/p1.jpg" src="images/110.gif" class="lazy" alt="" /></dt>
<dd>延时加载</dd>
</dl>
<dl>
<dt><img data-original="images/p2.jpg" src="images/110.gif" class="lazy" alt="" /></dt>
<dd>延时加载</dd>
</dl>
<dl>
<dt><img data-original="images/p3.jpg" src="images/110.gif" class="lazy" alt="" /></dt>
<dd>延时加载</dd>
</dl>
<dl>
<dt><img data-original="images/p4.jpg" src="images/110.gif" class="lazy" alt="" /></dt>>
<dd>延时加载</dd>
</dl>
<dl>
<dt><img data-original="images/p5.jpg" src="images/110.gif" class="lazy" alt="" /></dt>
<dd>延时加载</dd>
</dl>
<dl>
<dt><img data-original="images/p6.jpg" src="images/110.gif" class="lazy" alt="" /></dt>
<dd>延时加载</dd>
</dl>
<dl>
<dt><img data-original="images/p7.jpg" src="images/110.gif" class="lazy" alt="" /></dt>
<dd>延时加载</dd>
</dl>
<dl>
<dt><img data-original="images/p8.jpg" src="images/110.gif" class="lazy" alt="" /></dt>
<dd>延时加载</dd>
</dl>
<dl>
<dt><img data-original="images/p9.jpg" src="images/110.gif" class="lazy" alt="" /></dt>
<dd>延时加载</dd>
</dl>
<dl>
<dt><img data-original="images/p10.jpg" src="images/110.gif" class="lazy" alt="" /></dt>
<dd>延时加载</dd>
</dl>
<dl>
<dt><img data-original="images/p11.jpg" src="images/110.gif" class="lazy" alt="" /></dt>
<dd>延时加载</dd>
</dl>
<dl>
<dt><img data-original="images/p12.jpg" src="images/110.gif" class="lazy" alt="" /></dt>
<dd>延时加载</dd>
</dl>
</div>
</div>
</body>
</html>