图片开始下载的事件是什么？

[Philson]

<script language="JavaScript">
function changeImg()
{
form1.MyImage.src="bigPicture2";
}
</script>

<form name="form1" action="">
<img name="MyImage" src="bigPicture1" on??>
<input type="button" onclick="changeImg()">
</form>

当MyImage的src变为bigPicture2时，IE开始下载bigPicture2，如何使鼠标在bigPicture2下载期间显示为等待光标？图片开始下载的事件是什么？
请各位前辈指教，多谢！

[qiushuiwuhen]

<script language="JavaScript">
function changeImg()
{
form1.MyImage.src="1.jpg";
form1.MyImage.runtimeStyle.cursor='wait'
}
</script>

<form name="form1" action="">
<img name="MyImage" src="bigPicture1" onload="this.runtimeStyle.cursor=''">
<input type="button" onclick="changeImg()">
</form>

[qiushuiwuhen]

<script language="JavaScript">
function changeImg()
{
form1.MyImage.src="11.jpg";
}
</script>

<form name="form1" action="">
<img name="MyImage" src="bigPicture1" onreadystatechange="runtimeStyle.cursor=(readyState=='complete'?'':'wait')">
<input type="button" onclick="changeImg()">
</form>

[flashsoft2000]

onreadystatechange来触发事件即可

[dylanOK]

onReadyStateChange="alert(this.readystate)"

[flashsoft2000]

onreadystatechange来触发事件即可