版本更新css，js缓存问题

    <!-- css路径 -->
	<script>
        var now = new Date().getTime();
        document.write('<link href="../css/index.css?v=' + now + '" rel="stylesheet" type="text/css"/>');
    </script>
    
    <!-- js路径 -->
    <script type="text/javascript">
        document.write('<script src="../js/index.js?timestamp='+new Date().getTime()+'" type="text/javascript" charset="utf-8">	<\/script>');
    </script>