<html>
<title>图片预加载</title>
<body>
<script>
//判断浏览器
varBrowser=newObject();
Browser.userAgent=window.navigator.userAgent.toLowerCase();
Browser.ie=/msie/.test(Browser.userAgent);
Browser.Moz=/gecko/.test(Browser.userAgent);
//判断是否加载完成
functionImagess(url,imgid,callback){
varval=url;
varimg=newImage();
if(Browser.ie){
img.onreadystatechange=function(){
if(img.readyState=="complete"||img.readyState=="loaded"){
callback(img,imgid);
}
}
}elseif(Browser.Moz){
img.onload=function(){
if(img.complete==true){
callback(img,imgid);
}
}
}
//如果因为网络或图片的原因发生异常，则显示该图片
img.onerror=function(){img.src='http://www.baidu.com/img/baidu_logo.gif'}
img.src=val;
}
//显示图片
functioncheckimg(obj,imgid){
document.getElementById(imgid).src=obj.src;
}
//初始化需要显示的图片，并且指定显示的位置
window.onload=function(){
Imagess("http://hiphotos.baidu.com/lovebyakuya/pic/item/01cf20088f9506f063d98653.jpg","img1",checkimg);
Imagess("http://hiphotos.baidu.com/lovebyakuya/pic/item/7b7b19c70d62f4fdd0006050.jpg","img2",checkimg);
Imagess("http://hiphotos.baidu.com/joanne728/pic/item/892557641806d20eaa184c71.jpg","img3",checkimg);
Imagess("http://www.neocha.com/-/res/Camilla/20071204181216078845_h.jpg","img4",checkimg);
Imagess("http://www.neocha.com/-/res/Camilla/20071204181216d078845_h.","img5",checkimg);
}
</script>
<imgid="img1"src="loading.gif"width="100"height="100"/>
<imgid="img2"src="loading.gif"width="100"height="100"/>
<imgid="img3"src="loading.gif"width="100"height="100"/>
<imgid="img4"src="loading.gif"width="100"height="100"/>
<imgid="img5"src="loading.gif"width="100"height="100"/>
</body>
</html>
