- <!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"){
-
i
i
=i+1;
- callback(i);
- }
- }
- }else if(Browser.Moz){
-
img.onload
=
function
(){
- if(
img.complete
==true){
-
i
i
=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,
- }
- }