我的源文件如下：
<html>
<head> <title>show picture </title>
<script>
function change(fileName)
{
// var a = document.getElementsByTagName("param")[0].value;
document.getElementsByTagName("param")[0].value=fileName;
//var b =document.getElementsByTagName("param")[0].value;alert(b);
location.reload();
}
</script>
</head>
<body>
<div id="middle1" z-index="2" >
<object id="showpic" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0"
style="width: 500px; height:300px;">
<param name="movie" value="shiyuan.swf">
<param name="quality" value="High">
<embed src="../flash/menu1.swf" quality="high" pluginspage="ht
