取得FLASH对象的PercentLoaded方法,看其返回是否为100。下面是个小示例：
<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html" charset="UTF-8" allowfullscreen="true"/>
<title>FLASH 播放器 by 司徒正美</title>
<script language="javascript" type="text/javascript"> </script>
<style type="text/css">
html, body, #mask{
100%;
height:100%;
}
#mask{
background:url(http://softwarelivre.sapo.pt/projects/quizcreator/export/13/trunk/core/res/loading.gif) center center no-repeat;
}
</style>
</head>
<body>
<div id="mask">
<!--这里是蒙板-->
</div>
<div id="player">
<!--这里是播放器-->
</div>
<script type="text/javascript">
//通过ID取得页面元素
function $(id){
return document.getElementById(id)
}
//判定是否加载成功
function checkLoaded(flash){
try{
return Math.floor(flash.PercentLoaded()) == 100
}catch(e){
return false;
}
}
//取得flash的播放地址
function getFlashURL(){
return 'http://player.youku.com/player.php/sid/XMzkwNTgzMTIw/v.swf';
}
function createFlashHTML(u,w,h,i,wm,v){
var g= "";
if(window.ActiveXObject){
g='<OBJECT classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase=" http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0" id="'+i+'" name="'+i+'" border="0" width="'+w+'" height="'+h+'"><param name="movie" value="'+u+'" /><param name="quality" value="high" /><param name="allowScriptAccess" value="always" /><param name="menu" value="false" /><param name="allowFullScreen" value="true" /><param name="wmode" value="'+wm+'" /><param name="flashvars" value="'+v+'" /></OBJECT>'
}else{
g='<embed name="'+i+'" width="'+w+'" height="'+h+'" type="application/x-shockwave-flash" pluginspage=" http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" allowScriptAccess="always" allowFullScreen="true" quality="high" menu="false" wmode="'+wm+'" flashvars="'+v+'" src="'+u+'"></embed>'
}
return g;
}
var flashHTML = createFlashHTML(getFlashURL(),'100%','100%',"videoPlayer","Opaque","autoPlay=true&isAutoPlay=true&auto=1&playMovie=true&adss=0&api=1");
$("player").innerHTML = flashHTML
var flash = $("player").children[0];
var intervalID = setInterval(function(){
if(checkLoaded(flash)){
clearInterval(intervalID);
$("mask").style.display = "none";
intervalID = null;
}
},60)
</script>
</body>
</html>