<script type="text/javascript">

$(document).ready(function() {

    var read_time = $("#content").text().length;

    var read_zishu = $("#content").text().length;

    var read_time = read_time / 400; //计算阅读时间 400字是取中

    var read_time = Math.round(read_time);

    if (read_time > 1) {

        $('#read-time').html('本文共计' + read_zishu + '字，预计阅读时间' + read_time + '分钟');

    } else {

        $('#read-time').html('预计阅读时间1分钟');

    }

})

</script>

#content 为内容标签的id 例如：<div id="content">{$info.content}</div>