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<html>
<head>
<title>简单的Select联动菜单代码</title>
</head>
<body>
<FORM name="F1">
<SELECT NAME="select1" onChange="set_list(this.options.selectedIndex)">
<OPTION SELECTED>流行音乐</OPTION>
<OPTION>网上书籍</OPTION>
<OPTION>软件下载</OPTION>
</SELECT>
<SELECT NAME="select2" >
<OPTION SELECTED>请选网站</OPTION>
CSS代码...
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JS代码...