----------------------------------------------------------
<div id=load_stat>进度显示</div>
<script type=text/javascript>
var need_load=10;//部件里面使用onload的数量
var load_ok=0;
function show_loading(){
var e=document.getElementById('load_stat');
if (load_ok<need_load){
e.innerHTML='共有'+need_load+'个需要装载，已经装载了'+load_ok+'个，完成'+Math.round(load_ok/need_load,2)+'％';
setTimeout("show_loading();",500);//过半秒显示进度
} else e.style.display='none';//关闭进度条
}
setTimeout("show_loading();",500);//过半秒显示进度
</script>
<img src='...' onload="load_ok++;">
<img src='...' onload="load_ok++;">