重点：在元素进入可视区域后，把图片元素的 _src 的值，赋值给 src
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<style>
div{ margin-top:300px; width:470px; height:150px; border:1px #000 solid;}
</style>
<script src="jquery-1.11.1.js"></script>
<script>
$(function(){
toChange();
function toChange(){
$(‘img‘).each(function(i,elem){
if($(elem).offset().top<$(window).height()+$(window).scrollTop()){
$(elem).attr(‘src‘,$(elem).attr(‘_src‘));
}
});
}
$(window).scroll(toChange);
});
</script>
</head>
<body>
<div><img _src="img/1.jpg"></div>
<div><img _src="img/2.jpg"></div>
<div><img _src="img/3.jpg"></div>
<div><img _src="img/4.jpg"></div>
<div><img _src="img/5.jpg"></div>
</body>
</html>
时间： 2024-11-05 13:04:22