帝国CMS会员头像图片随机调用的实现方法

<img src='<?= $ecmsfirstpost == 1 ? "/images/1.jpg" : ehtmlspecialchars(stripSlashes($addr['userpic'])) ?>' id='img' width="180" height="180"/> <a href="javascript:void(0)" onclick="ChangeFace()">换一张</a> <input name="userpic" type="text" id="userpic" value='<?= $ecmsfirstpost == 1 ? "" : ehtmlspecialchars(stripSlashes($addr['userpic'])) ?>' size="" style="display:none"> <script src="https://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script> <script type="text/javascript"> function ChangeFace() {     var x = 10;     var y = 1;     var rand = parseInt(Math.random() * (x - y + 1) + y);     var face = '/images/' + rand + '.jpg';     $("#img").attr('src', face);     $("input[name='userpic']").attr('value', face); } </script>