<html>
<title>js图片未加载完显示loading效果</title>
<body>
<style>
img{float:left;200px;height:200px;margin:0 10px 10px 0}
</style>
<script>
//判断浏览器
var Browser=new Object();
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
function Imagess(url,imgid,callback){
var val=url;
var img=new Image();
if(Browser.ie){
img.onreadystatechange =function(){
if(img.readyState=="complete"||img.readyState=="loaded"){
callback(img,imgid);
}
}
}else if(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.86y.org/images/failed.png"}
img.src=val;
}
//显示图片
function checkimg(obj,imgid){
document.getElementById(imgid).style.cssText="";
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(){
var imglist=document.getElementById("imagelist").getElementsByTagName('img');
for(i=0;i<imglist.length;i++)
{
imglist[i].id="img0"+i;
imglist[i].style = "background:url(http://www.86y.org/images/loading.gif) no-repeat center center;";
Imagess(imglist[i].getAttribute("data"),imglist[i].id,checkimg);
}
}
</script>
<div id="imagelist">
<img data="http://www.smashingapps.com/wp-content/uploads/2013/05/uikitsforwebmobile17s.jpg" />
<img data="http://www.smashingapps.com/wp-content/uploads/2013/05/uikitsforwebmobile13.jpg" />
<img data="http://www.smashingapps.com/wp-content/uploads/2013/05/uikitsforwebmobile39.jpg" />
<img data="http://www.smashingapps.com/wp-content/uploads/2013/05/uikitsforwebmobile10.jpg" />
<img data="http://www.smashingapps.com/wp-content/uploads/2013/05/uikitsforwebmobile14.jpg" />
</div>
</body>
</html>