实现代码如下：
<!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=gb2312" />
<title>js 实现图片预加载 加载完后执行动作</title>
</head>
<style type="text/css">
<!--
*html{
margin:0;
padding:0;
border:0;
}
body{border:1px solid #f3f3f3; background:#fefefe}
div#loading{
width:950px;
height:265px;
line-height:265px;
overflow:hidden;
position:relative;
text-align:center;
}
div#loading p{
position:static;
+position:absolute;
top:50%;
vertical-align:middle;
}
div#loading p img{
position:static;
+position:relative;
top:-50%;left:-50%;
vertical-align:middle
}
-->
</style>
<div id="loading">
<p><img src="http://www.baidu.com/img/baidu_logo.gif" /></p>
</div>
<script>
var i=0;
var c=3;
var imgarr=new Array
imgarr[0]="http://www.baidu.com/img/baidu_logo.gif";
imgarr[1]="http://img.baidu.com/img/logo-img.gif";
imgarr[2]="http://img.baidu.com/img/logo-zhidao.gif";
var Browser=new Object();
Browser.userAgent=window.navigator.userAgent.toLowerCase();
Browser.ie=/msie/.test(Browser.userAgent);
Browser.Moz=/gecko/.test(Browser.userAgent);
function SImage(url,callback)
{
var img = new Image();
if(Browser.ie){
img.onreadystatechange =function(){
if(img.readyState=="complete"||img.readyState=="loaded"){
ii=i+1;
callback(i);
}
}
}else if(Browser.Moz){
img.onload=function(){
if(img.complete==true){
ii=i+1;
callback(i);
}
}
}
img.src=url;
}
function icall(v)
{
if(v<c){
SImage(""+imgarr[v]+"",icall);
}
else if(v>=c){
i=0;
//location.replace('banner.html');//这里写自己的动作吧，
}
}
以上就是【JS图片预加载 JS实现图片预加载应用】的全部内容了,欢迎留言评论进行交流!