Jquery图片随滚动条加载

2022-09-06 13:27:51
很久以前的写的Jquery图片随滚动条加载,现在不是什么新技术,应用也很广泛,大大提高图片多的页面打开速度!
有需要的朋友看看吧!有什么意见或建议欢迎留言交流!
Demo.html 源码:
<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

    <title>Jquery图片随滚动条加载</title>

    <meta name="keywords" content="动态加载图片,图片预加载,滚动加载图片,Jquery图片加载,图片随滚动条加载" />

    <meta name="description" content="图片随滚动条加载2012-10-11 - 调用方法：$(img).ImageLoad(提前量,滚动条距离图片多少像素加载图片);  by TonY-c  QQ:20011011" />

    <style type="text/css">

        img {border:1px solid #cdcdcd;}

        .load-img {background: url(data:image/gif;base64,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) no-repeat 50% 50%;}

    </style>

</head>

<body>

    <img loadsrc="http://www.ansonika.com/bed-and-breakfast/images/room-1.jpg" width="504" height="366" class="load-img" />

    <br /><img loadsrc="http://www.ansonika.com/bed-and-breakfast/images/room-1_2.jpg" width="504" height="366" class="load-img" />

    <br /><img loadsrc="http://www.ansonika.com/bed-and-breakfast/images/room-1_3.jpg" width="504" height="366" class="load-img" />

    <br /><img loadsrc="http://www.ansonika.com/bed-and-breakfast/images/patio.jpg" width="605" height="352" class="load-img" />

    <br /><img loadsrc="http://www.ansonika.com/bed-and-breakfast/images/swimm.jpg" width="605" height="352" class="load-img" />

    <br /><img loadsrc="http://www.ansonika.com/bed-and-breakfast/images/seaview.jpg" width="605" height="352" class="load-img" />

    <br /><img loadsrc="http://www.ansonika.com/bed-and-breakfast/images/entrance.jpg" width="605" height="352" class="load-img" />

    <br /><img loadsrc="http://www.ansonika.com/bed-and-breakfast/images/balcony.jpg" width="605" height="352" class="load-img" />

    <br /><img loadsrc="http://www.ansonika.com/bed-and-breakfast/images/parking.jpg" width="605" height="352" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_1.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_2.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_3.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_4.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_5.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_6.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_7.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_8.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_10.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_11.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_13.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_14.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_15.jpg" width="700" height="450" class="load-img" />

    <br /><img loadsrc="http://webdesignpro09.info/themeforest_underground/underground_white/lib/images/photos/project_16.jpg" width="700" height="450" class="load-img" />

    <script type="text/javascript" src="http://www.google.com/jsapi"></script>

    <script type="text/javascript">

        google.load("jquery", "1.7");

        google.setOnLoadCallback(function () {

            /*   jquery.ScrollImageLoad.js  开始   */

            /*图片随滚动条加载2012-10-11 - 调用方法：$("img").ImageLoad(提前量,滚动条距离图片多少像素加载图片);  by TonY-c  QQ:20011011*/

            (function ($) {

                $.fn.extend({

                    ShowImg: function (h) {

                        var img = this;

                        var pageTop = function () {

                            return document.documentElement.clientHeight + Math.max(document.documentElement.scrollTop, document.body.scrollTop) - (h ? h : -100);

                        };

                        var imgLoad = function () {

                            img.each(function () {

                                if ($(this).offset().top <= pageTop()) {

                                    var newSrc = $(this).attr("loadsrc");

                                    if (newSrc) $(this).attr("src", newSrc).removeAttr("loadsrc");

                                }

                            });

                        }; imgLoad(); $(window).bind("scroll", function () { imgLoad(); });

                    }

                });

            })(jQuery);

            /*   jquery.ScrollImageLoad.js  结束   */

            $(function () {

                //测试时调用方法,清除图片缓存

                //代码".attr("loadsrc", function () { return $(this).attr("loadsrc") + "?" + Math.random() })"

                //实际应用时必须删除

                //只保留$("img[loadsrc]").ShowImg();即可;

                //$("img[loadsrc]").ShowImg(100);  参数100为提前量,提前100像素加载图片;

                $("img[loadsrc]").attr("loadsrc", function () { return $(this).attr("loadsrc") + "?" + Math.random() }).ShowImg();

            });

        });

    </script>

</body>

</html>
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