延时加载效果的实现 

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>

 

posted on 2016-08-06 13:10  jasonduanmu  阅读(162)  评论(0)  编辑  收藏  举报

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